research article exact solution of the dirac equation for the ...er a new approach for the solving...
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Hindawi Publishing CorporationISRN High Energy PhysicsVolume 2013 Article ID 310392 6 pageshttpdxdoiorg1011552013310392
Research ArticleExact Solution of the Dirac Equation for the Yukawa Potentialwith Scalar and Vector Potentials and Tensor Interaction
Mona Azizi1 Nasrin Salehi1 and Ali Akbar Rajabi2
1 Department of Basic Science Shahrood Branch Islamic Azad University Shahrood 36199-43189 Iran2 Physics Department Shahrood University of Technology PO Box 3619995161-316 Shahrood Iran
Correspondence should be addressed to Nasrin Salehi salehishahroodutacir
Received 22 January 2013 Accepted 6 February 2013
Academic Editors K Cho and A Koshelev
Copyright copy 2013 Mona Azizi et al This is an open access article distributed under the Creative Commons Attribution Licensewhich permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited
We present exact solutions of the Dirac equation with Yukawa potential in the presence of a Coulomb-like tensor potential For thisgoal we expand the Yukawa form of the nuclear potential in its mesonic clouds by using Taylor extension to the power of seventhand bring out its simple form In order to obtain the energy eigenvalue and the corresponding wave functions in closed forms forthis potential (with great powers and inverse exponent) we use ansatz methodWe also regard the effects of spin-spin spin-isospinand isospin-isospin interactions on the relativistic energy spectra of nucleon By using the obtained results we have calculated thedeuteron mass The results of our model show that the deuteron spectrum is very close to the ones obtained in experiments
1 Introduction
It is well known that the exact energy eigenvalues of thebound state play an important role in quantum mechanicsIn particular the Dirac equation which describes the motionof a spin-12 particle has been used in solving many problemsof nuclear and high-energy physics Recently there has beenan increase in searching for analytic solution of the Diracequation [1ndash11] Recently tensor couplings have been usedwidely in the studies of nuclear properties [12ndash22] and theywere introduced into the Dirac equation by substitution
119875 rarr
119875minus119894119898120596120573sdot 119880(119903) [16 23] where119898 is one of the particlesmassand120596 refers to harmonic oscillator In this work we are goingto solve the relativistic Dirac equation for Yukawa potentialin fresh approaches We first discuss the Dirac equationwith a tensor potential for Yukawa potential Then we solvethe resulting equations for deuteron nuclei and obtain theparameters for it We are also able to number the mass ofDeuteron by using obtained parameters and the equation isin conformity with experimental measure
2 Yukawa Potential
The screened Coulomb potential also known as the Yukawapotential in atomic physics and theDebye-Huckel potential in
plasma physics is of interest in many areas of physics It wasoriginally used tomodel strong nucleon-nucleon interactionsdue tomeson exchange in nuclear physics by Yukawa [19 20]It is also used to represent a screened Coulomb potentialdue to the cloud of electronic charges around the nucleus inatomic physics or to account for the shielding by outer chargesof the Coulomb field experienced by an atomic electron inhydrogen plasmaHowever the Schrodinger equation for thispotential cannot be solved exactly hence various numericaland pertubative methods have been devised to obtain theenergy levels and related physical quantities [24]The genericform of this potential is given by
119880 (119909) = minus
119892
119909
119881 (119909) 119892 gt 0 (1)
that 119892 is the potential strength and
119881 (119909) = 119890
minus119896119909
(2)
In this part we expand the Yukawa potential in its mesonclouds 119909 = 119886 by using Taylor extension to the power ofseventh
2 ISRN High Energy Physics
119880 (119909) = minus
119892
119909
[119890
minus119896119886
minus 119896119890
minus119896119886
(119909 minus 119886) +
119896
2
2
119890
minus119896119886
(119909 minus 119886)
2
minus
119896
3
3
119890
minus119896119886
(119909 minus 119886)
3
+
119896
4
4
119890
minus119896119886
(119909 minus 119886)
4
minus
119896
5
5
119890
minus119896119886
(119909 minus 119886)
5
+
119896
6
6
119890
minus119896119886
(119909 minus 119886)
6
minus
119896
7
7
119890
minus119896119886
(119909 minus 119886)
7
+ sdot sdot sdot]
(3)
We can reduce this equation to
119880 (119909) = 119886119909
6
minus 119887119909
5
+ 119888119909
4
minus 119889119909
3
+ 119890119909
2
minus 119891119909 + ℎ minus
119871
119909
(4)
Now we have the general Yukawa equation that 119886 119887 119888 119889 119890119891 ℎ and 119871 are
119886 =
119896
7
7
119887 = minus (
7
7
119896
6
+
7
7
119896
6
)
119888 = (
21
7
119896
5
+
6
6
119896
5
+
1
5
119896
5
)
119889 = minus (
35
7
119896
4
+
15
6
119896
4
+
5
5
119896
4
+
1
3
119896
4
)
119890 = (
35
7
119896
3
+
20
6
119896
3
+
10
5
119896
3
+
6
4
119896
3
+
3
3
119896
3
+
1
2
119896
3
)
119891 = minus (
21
7
119896
2
+
15
6
119896
2
+
10
5
119896
2
+
6
4
119896
2
+
3
3
119896
2
+
1
2
119896
2
)
ℎ = (
7
7
119896 +
6
6
119896 +
5
5
119896 +
4
4
119896 +
3
3
119896 +
1
2
119896 + 119896)
119871 = minus (
7
7
+
6
6
+
5
5
+
4
4
+
3
3
+
1
2
+ 2)
(5)
3 Exact Analytical Solution of the DiracEquation for Yukawa Potential
We are interested in the particular solution of the Dirac equa-tionwith the Yukawa interaction potential (4) In this sectionwe anticipate the answer and then obtain the parameters forhighest nuclei deuteron A deuteron consists of a neutronand a proton Let us assume one nucleon is fixed and anothernucleon ismoving around the center ofmass At last by usingsingle particle model we investigate the effects of one pionexchange for a single nucleon The Dirac Hamiltonian is
119867 = sdot119875 + 120573 (119898 + 119878) + 119881 minus 119894120573 sdot 119880 (6)
where 119878 is the scalar potential119881 is the vector potential and119880is the tensor partWe have Δ = 119881minus119878 andΣ = 119881+119878TheDiracequation can be solved exactly for the cases Δ = 0 and Σ = 0 sdot
= (
0120590
120590 0
) and 120573 = ( 119868 00 minus119868
)which are the usual Dirac matricesWewill indicate upper and lower components of Dirac spinorwith Ψ
119860
and Ψ119861
Expressing the Dirac matrices in terms ofthe Paulimatrices we obtain the following coupled equations[25 26]
sdot119875Ψ119860
+ (119881 minus 119878 minus 119898)Ψ119861
+ 119894 sdot 119909119880 (119909)Ψ119860
= 119864Ψ119861
(7a)
sdot119875Ψ119861
+ (119881 + 119878 + 119898)Ψ119860
minus 119894 sdot 119909119880 (119909)Ψ119861
= 119864Ψ119860
(7b)
We assume that 119881 119878 and 119880 are radial potentials Using theidentity
sdot119875 =
( sdot )
119909
2
( sdot ) ( sdot119875) =
( sdot )
119909
2
(minus119894119909
120597
120597119909
+ 119894 sdot119871)
(8)
With (7a) and (7b) we find the following second-orderdifferential equations for Ψ
119860
and Ψ119861
119875
2
Ψ119860
+ (119880
2
+
119889119906
119889119909
+
2119906
119909
+
(119889Δ119889119909)
(119864 + 119898 minus Δ)
119880)Ψ119860
+ (4119880 + 2
(119889Δ119889119909)
(119864 + 119898 minus Δ)
)(
119878 sdot
119871
2
)Ψ119860
minus
(119889Δ119889119909)
(119864 + 119898 minus Δ)
120597Ψ119860
120597119909
= (119864 + 119898 minus Δ) (119864 + 119898 minus Σ)Ψ119860
(9a)
119875
2
Ψ119861
+ (119880
2
minus
119889119906
119889119909
minus
2119906
119909
minus
(119889Σ119889119909)
(119864 minus 119898 minus Σ)
119880)Ψ119861
+ (minus4119880 + 2
(119889Σ119889119909)
(119864 minus 119898 minus Σ)
)(
119878 sdot
119871
2
)Ψ119861
+
(119889Σ119889119909)
(119864 minus 119898 minus Δ)
120597Ψ119861
120597119909
= (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ)Ψ119861
(9b)
Here 119878 stands for the (12) spin operator and
119871 for orbitalangular momentum operator The Hamiltonian operatorcommutes with the total angular momentum operator whichis given by
119869 =119871 +
119878 and with the parity operator Therefore
the eigenfunctions defined by Hamiltonian can be expressedas
Ψ119899119895119898119896
= (
119894
119892119899119896
(119909)
119909
120601
119897
119895119898119896
()
119891119899119896
(119909)
119909
120601
119897
119895119898(minus119896)
()
) (10)
where 120601119897119895119898119896
() denotes the spin spherical harmonics Thequantum number 119896 is related to ℓ and 119895 as follows
119896 =
minus (ℓ + 1) = minus (119895 +
1
2
) 119895 = ℓ +
1
2
ℓ = + (119895 +
1
2
) 119895 = ℓ minus
1
2
(11)
ISRN High Energy Physics 3
For spin spherical harmonics we have
sdot 120601
119897
119895119898119896
= 120601
119897
119895119898(minus119896)
(12)
Equations (9a) and (9b) reduced to a set of coupled equationsfor the radial wave functions 119892
119896
and 119891120581
(
119889
2
119889119909
2
minus
119896 (119896 + 1)
119909
2
+
2119896
119909
119880 minus
119889119880
119889119909
minus 119880
2
)119892119896
(119909)
+
119889Δ119889119909
(119864 + 119898 minus Δ)
(
119889
119889119909
+
119896
119909
minus 119880)119892119896
(119909)
= minus (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ) 119892119896
(119909)
(13a)
(
119889
2
119889119909
2
minus
119896 (119896 minus 1)
119909
2
+
2119896
119909
119880 +
119889119880
119889119909
minus 119880
2
)119891119896
(119909)
+
119889Σ119889119909
(119864 minus 119898 minus Δ)
(
119889
119889119909
minus
119896
119909
+ 119880)119891119896
(119909)
= minus (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ)119891119896
(119909)
(13b)
Using the following relations [13]
2119878 sdot
119871 =
119869
2
minus119871
2
minus119878
2
sdot119871120601
119897
119895119898119896
= minus (119896 + 1) 120601
119897
119895119898119896
sdot119871120601
119897
119895119898(minus119896)
= minus (119896 + 1) 120601
119897
119895119898(minus119896)
(14)
for particle of119898mass and 119864 energy we have
119878 = 119881 =
1
2
Σ
Σ (119909) = 119886119909
6
minus 119887119909
5
+ 119888119909
4
minus 119889119909
3
+ 119890119909
2
minus 119891119909 + ℎ minus
119871
119909
Δ (119909) = 0
119880 (119909) = minus
1
119909
(15)
We assume the case 119878(119909) = 119881(119909) [27ndash31] and consider 119896(119896 +1) = ℓ(ℓ+1) then the upper component in (13a) is as follows
(
119889
2
119889119909
2
minus
ℓ (ℓ + 1) + 2 + 2119896
119909
2
minus Σ (119903) (119864 + 119898))119892119896
(119909)
= (119898
2
minus 119864
2
) 119892119896
(119909)
(16)
As we know in deuteron two nucleons have in D-state so
[
119889
2
119889119909
2
minus
ℓ (ℓ + 1) + 2 minus 2 (ℓ + 1)
119909
2
]119892119896
(119909)
= ((1198861
119909
6
minus1198871
119909
5
+1198881
119909
4
minus1198891
119909
3
+1198901
119909
2
minus1198911
119909+ℎ1
minus
1198711
119909
)
minusE)119892119896
(119909)
(17)
Therefore we have a Schrodinger-like equation [31]
119892
10158401015840
1
(119909) = [(1198861
119909
6
minus1198871
119909
5
+1198881
119909
4
minus1198891
119909
3
+1198901
119909
2
minus1198911
119909+ℎ1
minus
1198711
119909
)
minusE +
ℓ (ℓ minus 1)
119909
2
]
(18)
By setting
119886 (1198641
+ 119898) = 1198861
119887 (1198641
+ 119898) = 1198871
119888 (1198641
+ 119898) = 1198881
119889 (1198641
+ 119898) = 1198891
(19)
119890 (1198641
+ 119898) = 1198901
119891 (1198641
+ 119898) = 1198911
ℎ (1198641
+ 119898) = ℎ1
119871 (1198641
+ 119898) = 1198711
(1198641
2
minus 119898
2
) = E
(20)
In order to solve (18) we suppose the following form for thewave function
119892 (119909) = 119872 (119909) 119890
119885(119909)
(21)
Now for the functions119872(119909) and119885(119909) respectively we makeuse of the following ansatz [27 32 33]
119872(119909) =
1 if ground stateV
prod
119894=1
(119909 minus 119886
V119894
) if V gt 0
119885 (119909) = minus
1
4
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909 + 120575 ln119909
(22)
For a particular grand angular quantum number 120574 thereare different solutions which are labeled by 120592 (120592 determinesthe number of the nodes of the wave function) By substitu-tion of119872(119909) and 119885(119909) into (21) and then taking the second-order derivative of the obtained equation we can get
119892
10158401015840
(119909) = [119885
10158401015840
+ 119885
10158402
+
119872
10158401015840
+ 2119872
1015840
119885
1015840
119872
] (23)
We consider the ground state which is called the 0th nodesolution of the above differential equation By equating (18)and (23) for 120592 = 0 it can be found that
120572 = radic1198861
120573 = minus
1198871
2
radic1198861
120578 =
1198881
minus 1205731
2120572
120591 =
minus1198891
minus 2120573120578
2120572
120575 = ℓ minus 1 E = 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(24)
The upper component is as follows
1198921
(119909) = 1198730
119909
ℓminus1 exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909) (25)
and another component of wave function is
1198911
(119909) =
( sdot119875 + 119894 sdot 119880)
(119864 + 119898)
1198921
(119909) (26)
4 ISRN High Energy Physics
By substituting (25) into (26) we obtained the followingequation
1198911
(119909) =
minus119894 sdot
(119864 + 119898)
[
119889
119889119909
minus 119894 sdot119871 minus 119880]119873
0
119909
ℓminus1
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909)
(27)
Therefore the total wave function is
Ψ = 1198730
(
1
minus119894 sdot
(119864 + 119898)
[120572119909
3
+ 120573119909 + 120578119909 + 120591 +
1
119909
]
)
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578 minus 120591119909)
(28)
Now we have to obtain parameters 119886 119887 119888 119889 119890 119891 ℎ and 119871 byusing of (5)
119887 =
14
119896
119886 119888 =
105
119896
2
119886 119889 =
440
119896
3
119886 119890 =
2555
119896
4
119886
119891 =
6846
119896
5
119886 ℎ =
8659
119896
6
119886
(29)
We know that 119896 = 1119909 = 0714 (fmminus1) [34] by using of (24)we can get amount of parameters 120572 120573 120578 and 120591
120572 = radic1198861
120573 = minus98radic1198861
120578 = 8308radic1198861
120591 = 8308radic1198861
(30)
The bonding energy for deuteron is reported 2224MeV [35]This is useful for calculating the numeric values of parametersin (30)
120576 = 119864
2
minus 119898
2
= 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(31)
By substituting the amounts of (31) and ℓ = 1 we obtainedthe numeric values of parameters in (30) The parameters arereported in Table 1 while the parameters of Yukawa potentialare reported in Table 2
4 The Hyperfine Interaction
As the Baryons have spin and isospin the deuteron neutronand proton can interact together We introduce the hyperfineinteraction potential The complete potential is
⟨119867int (119909)⟩ = 119881 (119909) + ⟨119867119878 (119909)⟩ + ⟨119867119868 (119909)⟩ + ⟨119867119878119868 (119909)⟩ (32)
In this work we have added the hyperfine interactionpotentials (119867
119878
(119909) 119867119868
(119909) and119867119878119868
(119909)) which yield propertiesvery close to the experimental results By regarding 119881(119909) asthe nonpertubative potential and the other terms in (32) aspertubative ones according to this explanation The spin andisospin potential contains a 120575-like term We have modified it
by a Gaussian function of the nucleons pair relative distance[36]
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878sum(
119878119894
sdot119878119895
) (33)
where 119878119894
is the spin operator of the 119894th nucleon and 119909 is therelative nucleon pair coordinate 119860
119904
and 120590119878
are constants120590119878
= 287 fm and 119860119878
= 674 fm2 [34 37] We know that thedeuteron consists of two nucleons Where 1 indicate the firstnucleon and 2 indicate the second nucleon We have
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878(
1
2
) [119878
2
minus 119878
2
1
minus 119878
2
2
] (34)
Furthermore we add two hyperfine interaction terms to theHamiltonian nucleon pairs similar to (33) [38]
119867119868
= 119860119878
1
(radic120587120590119868
)
3
119890
minus119909
2120590
2
119868sum(
119868119894
sdot119868119895
) (35)
where 119868119894
is the isospin operator of the 119894th nucleon and theconstants are described as 120590
119868
= 345 fm and 119860119868
= 517 fm2[37 39] The another one is a spin-isospin interaction givenby similar (33) [38 40]
119867119878119868
= 119860119878119868
1
(radic120587120590119878119868
)
3
119890
minus119909
2120590
2
119878119868sum(
119878119894
sdot119878119895
) (119868119894
sdot119868119895
) (36)
The fitted parameters are 120590119878119868
= 231 fm and119860119878119868
= minus1062 fm2[35 41] where 120595
120574
is the perturbed wave function and wewrite it as
120595120574
= 120595
1015840
120574
+ sum
120574
1015840=120574
⟨120595
0
120574
1015840 | 119867int | 1205950
120574
1015840⟩120595
10158400
120574
1015840
119864
0
120574
minus 119864
10158400
120574
(37)
The deuteronmass are given by two nucleonsmasses and theeigenenergies of the Dirac equation119864 (119864 is a function of 120578 120575120591 ℎ119898) with the first-order energy correction from potential119867int can be obtained by using the unperturbed wavefunction(33) (35) and (36)The total potential for the ground state aswell as the other states can be written as [40 42]
⟨119867int⟩ =int120595
lowast
120574
119867in1205951205741199092
119889119909 119889Ω
int120595
lowast
120574
120595120574
119909
2
119889119909 119889Ω
(38)
We first assume 120574 = 0 The potentials can be extracted from(33) (35) and (36)
119867119878
= 010059 (MeV)
119867119868
= 004782 (MeV)
119867119878119868
= minus050053 (MeV)
(39)
Now we can calculate the deuteron mass according to thefollowing formula
119872119863
= 119898119899
+ 119898119901
+ 119864120592120574
+ ⟨119867int⟩ (40)
ISRN High Energy Physics 5
Table 1 The best adaption with experimental value is 1198861
= 306136 120572 = 174967 120573 = minus17146815 120578 = 145362999 120591 =
minus14102380 and 119864 (MeV) = 219020
1198861
120572 120573 120578 120591 119864 (MeV)306131 174965 minus17146628 145361420 minus14102227 289658306134 174967 minus17146785 145362749 minus14102356 249699306135 174967 minus17146805 145362915 minus14102372 234861306136 174967 minus17146815 145362999 minus1410238 21902030638 174967 minus17147648 145377006 minus1410234 183278
Table 2 The value of the Yukawa potential parameters
119886 (fmminus7) 119887 (fmminus6) 119888 (fmminus5) 119889 (fmminus4) 119890 (fmminus3) 119891 (fmminus2) ℎ (fmminus1)021961 430589 4524045 26553556 21597519 81092235 143625603
By substituting119898119899
= 119898119901
= 938 (MeV) = 465 (fmminus1) energyeigenvalue (119864
120592120574
) and the expectation values of119867int in (40) wehave
119872119863
= 187783808 (MeVc2) (41)
By comparing the experimental amount of deuteronmass (119872
119863
= 1875612 (MeVc2) = 929 (fmminus1)) with ourcalculatedmass for deuteronwe found that a good agreementhas been obtained by our model [35]
5 Conclusion
In this work we offer a new approach for the solving ofYukawa potential We expand this potential around of itsmesonic cloud that gets a new form with great powers andinverse exponent We calculate wave function of the Diracequation for a new form of Yukawa potential including acoulomb-like tensor potential By considering the effects ofpertubative interaction potential we see that the theoreticaland experimental masses are in complete agreement Theseimprovements in reproduction of deuteron mass is obtainedby using a suitable form for confinement potential and exactanalytical solution of the Dirac equation for our proposedpotential Finally one can use this model for another nucleiby relativistic or nonrelativistic equation and get the proper-ties of them and the amount of ldquo119892rdquo the strength of nuclearforce
References
[1] H Motavali ldquoBound state solutions of the Dirac equationfor the Scarf-type potential using Nikiforov-Uvarov methodrdquoModern Physics Letters A vol 24 no 15 pp 1227ndash1236 2009
[2] M R Setare and Z Nazari ldquoSolution of Dirac equations withfive-parameter exponent-type potentialrdquo Acta Physica PolonicaB vol 40 no 10 pp 2809ndash2824 2009
[3] L-H Zhang X-P Li and C-S Jia ldquoAnalytical approximationto the solution of the Dirac equation with the Eckart potentialincluding the spin-orbit coupling termrdquo Physics Letters A vol372 no 13 pp 2201ndash2207 2008
[4] C-L Ho ldquoQuasi-exact solvability of Dirac equation withLorentz scalar potentialrdquo Annals of Physics vol 321 no 9 pp2170ndash2182 2006
[5] H Panahi and L Jahangiry ldquoShape invariant and Rodriguessolution of the Dirac-shifted oscillator and Dirac-Morse poten-tialsrdquo International Journal of Theoretical Physics vol 48 no 11pp 3234ndash3240 2009
[6] A D Alhaidari ldquo1198712 series solution of the relativistic Dirac-Morse problem for all energiesrdquo Physics Letters A vol 326 no1-2 pp 58ndash69 2004
[7] F D Adame and M A Gonzalez ldquoSolvable linear potentials inthe Dirac equationrdquo Europhysics Letters vol 13 no 3 pp 193ndash198 1990
[8] A S de Castro and M Hott ldquoExact closed-form solutions ofthe Dirac equation with a scalar exponential potentialrdquo PhysicsLetters A vol 342 no 1-2 pp 53ndash59 2005
[9] Y Chargui A Trabelsi and L Chetouani ldquoExact solution of the(1+1)-dimensional Dirac equationwith vector and scalar linearpotentials in the presence of a minimal lengthrdquo Physics LettersA vol 374 no 4 pp 531ndash534 2010
[10] A S de Castro ldquoBound states of theDirac equation for a class ofeffective quadratic plus inversely quadratic potentialsrdquo Annalsof Physics vol 311 no 1 pp 170ndash181 2004
[11] J-Y Guo J Meng and F-X Xu ldquoSolution of the Dirac equationwith special Hulthen potentialsrdquoChinese Physics Letters vol 20no 5 pp 602ndash604 2003
[12] H Akcay and C Tezcan ldquoExact solutions of the dirac equationwith harmonic oscillator potential including a coulomb-liketensor potentialrdquo International Journal ofModern Physics C vol20 no 6 pp 931ndash940 2009
[13] H Akcay ldquoDirac equation with scalar vector quadratic poten-tials and coulomb-like tensor potentialrdquo Physics Letters A vol373 pp 616ndash620 2009
[14] O Aydogdu and R Sever ldquoExact pseudospin symmetric solu-tion of the Dirac equation for pseudoharmonic potential in thepresence of tensor potentialrdquo Few-Body Systems vol 47 no 3pp 193ndash200 2010
[15] M Eshghi ldquoDirac-Hua problem including a Coulomb-liketensor interactionrdquo Advanced Studies inTheoretical Physics vol5 no 12 pp 559ndash571 2011
[16] G Mao ldquoEffect of tensor couplings in a relativistic Hartreeapproach for finite nucleirdquo Physical Review C vol 67 Article ID044318 12 pages 2003
[17] P Alberto R Lisboa M Malheiro and A S de Castro ldquoTensorcoupling and pseudospin symmetry in nucleirdquo Physical ReviewC vol 71 Article ID 034313 2005
6 ISRN High Energy Physics
[18] R J Furnstahl J J Rusnak and B D Serot ldquoThe nuclear spin-orbit force in chiral effective field theoriesrdquo Nuclear Physics Avol 632 no 4 pp 607ndash623 1998
[19] H Yukawa ldquoOn the interaction of elementary particles IrdquoProceedings of the Physico-Mathematical Society of Japan vol 17pp 48ndash57 1935
[20] H Yukawa ldquoOn the interaction of elementary particles IIrdquoProceedings of the Physico-Mathematical Society of Japan vol 19pp 1084ndash1093 1937
[21] S Zarrinkamar A A Rajabi and H Hassanabadi ldquoDiracequation for the harmonic scalar and vector potentials andlinear plus Coulomb-like tensor potential the SUSY approachrdquoAnnals of Physics vol 325 no 11 pp 2522ndash2528 2010
[22] H Hassanabadi E Maghsoodi S Zarrinkamar and H Rahi-mov ldquoDirac equation for generalized Poschl-Teller scalarand vector potentials and a Coulomb tensor interaction byNikiforov-Uvarov methodrdquo Journal of Mathematical Physicsvol 53 no 2 Article ID 022104 2012
[23] M Moshinsky and A Szczepaniak ldquoThe Dirac oscillatorrdquoJournal of Physics A vol 22 no 17 pp L817ndashL819 1989
[24] H Bahlouli M S Abdelmonem and I M Nasser ldquoAnalyticaltreatment of the Yukawa potentialrdquo Physica Scripta vol 82Article ID 065005 2010
[25] M R Shojaei and A A Rajabi ldquoHypercentral constituent quarkmodel and the hyperfine dependence potentialrdquo Iranian Journalof Physics Research vol 7 no 2 2007
[26] A A Rajabi ldquoA three-body force model for the harmonic andanharmonic oscillatorrdquo Iranian Journal of Physics Research vol5 no 2 2005
[27] N Salehi and A A Rajabi ldquoProton static properties by usinghypercentral constituent quark model and isospinrdquo ModernPhysics Letters A vol 24 no 32 pp 2631ndash2637 2009
[28] A D Alhaidari H Bahlouli and A Al-Hasan ldquoDirac andKlein-Gordon equations with equal scalar and vector poten-tialsrdquo Physics Letters A vol 349 no 1ndash4 pp 87ndash97 2006
[29] A A Rajabi ldquoHypercentral constituent quark model andisospin for the baryon static propertiesrdquo Journal of SciencesIslamic Republic of Iran vol 16 pp 73ndash79 2005
[30] N Salehi and A A Rajabi ldquoA new method for obtaining thespectrum of baryon resonances in the Killingbeck potentialrdquoPhysica Scripta vol 85 Article ID 055101 2012
[31] C-Y Chen ldquoExact solutions of the Dirac equation with scalarand vector Hartmann potentialsrdquo Physics Letters A vol 339 no3-5 pp 283ndash287 2005
[32] A A Rajabi ldquoA method to solve the Schrodinger equationfor any power hypercentral potentialsrdquo Communications inTheoretical Physics vol 48 no 1 pp 151ndash158 2007
[33] N Salehi A A Rajabi and Z Ghalenovi ldquoSpectrum of strangeand nonstrange baryons by using generalized gursey radicatimass formula and hypercentral potentialrdquoActa Physica PolonicaB vol 42 no 6 pp 1247ndash1259 2011
[34] S S M Wong ldquoIntroductory Nuclear Physicsrdquo John Wiley ampSons 1998
[35] N Salehi A A Rajabi and Z Ghalenovi ldquoCalculation ofnonstrange baryon spectra based on symmetry group theoryand the hypercentral potentialrdquo Chinese Journal of Physics vol50 no 1 p 28 2012
[36] L Y Glozman W Plessas K Varga and R F WagenbrunnldquoUnified description of light- and strange-baryon spectrardquoPhysical Review D vol 58 no 9 Article ID 094030 1998
[37] M De Sanctis M M Giannini E Santopinto and A VassalloldquoElectromagnetic form factors in the hypercentral CQMrdquo Euro-pean Physical Journal A vol 19 no 1 pp 81ndash85 2004
[38] L Y Glozman and D O Riska ldquoThe spectrum of the nucleonsand the strange hyperons and chiral dynamicsrdquo Physics Reportvol 268 no 4 pp 263ndash303 1996
[39] M F de la Ripelle ldquoA confining potential for quarksrdquo NuclearPhysics A vol 497 pp 595ndash602 1989
[40] MM Giannini E Santopinto and A Vassallo ldquoAn overview ofthe hypercentral Constituent QuarkModelrdquo Progress in Particleand Nuclear Physics vol 50 no 2 pp 263ndash272 2003
[41] H Hassanabadi ldquoA simple physical approach to study spectrumof baryonsrdquo Communications in Theoretical Physics vol 55 no2 p 303 2011
[42] HHassanabadi A A Rajabi and S Zarrinkamar ldquoSpectrum ofbaryons and spin-isospin dependencerdquo Modern Physics LettersA vol 23 no 7 pp 527ndash537 2008
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
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ThermodynamicsJournal of
2 ISRN High Energy Physics
119880 (119909) = minus
119892
119909
[119890
minus119896119886
minus 119896119890
minus119896119886
(119909 minus 119886) +
119896
2
2
119890
minus119896119886
(119909 minus 119886)
2
minus
119896
3
3
119890
minus119896119886
(119909 minus 119886)
3
+
119896
4
4
119890
minus119896119886
(119909 minus 119886)
4
minus
119896
5
5
119890
minus119896119886
(119909 minus 119886)
5
+
119896
6
6
119890
minus119896119886
(119909 minus 119886)
6
minus
119896
7
7
119890
minus119896119886
(119909 minus 119886)
7
+ sdot sdot sdot]
(3)
We can reduce this equation to
119880 (119909) = 119886119909
6
minus 119887119909
5
+ 119888119909
4
minus 119889119909
3
+ 119890119909
2
minus 119891119909 + ℎ minus
119871
119909
(4)
Now we have the general Yukawa equation that 119886 119887 119888 119889 119890119891 ℎ and 119871 are
119886 =
119896
7
7
119887 = minus (
7
7
119896
6
+
7
7
119896
6
)
119888 = (
21
7
119896
5
+
6
6
119896
5
+
1
5
119896
5
)
119889 = minus (
35
7
119896
4
+
15
6
119896
4
+
5
5
119896
4
+
1
3
119896
4
)
119890 = (
35
7
119896
3
+
20
6
119896
3
+
10
5
119896
3
+
6
4
119896
3
+
3
3
119896
3
+
1
2
119896
3
)
119891 = minus (
21
7
119896
2
+
15
6
119896
2
+
10
5
119896
2
+
6
4
119896
2
+
3
3
119896
2
+
1
2
119896
2
)
ℎ = (
7
7
119896 +
6
6
119896 +
5
5
119896 +
4
4
119896 +
3
3
119896 +
1
2
119896 + 119896)
119871 = minus (
7
7
+
6
6
+
5
5
+
4
4
+
3
3
+
1
2
+ 2)
(5)
3 Exact Analytical Solution of the DiracEquation for Yukawa Potential
We are interested in the particular solution of the Dirac equa-tionwith the Yukawa interaction potential (4) In this sectionwe anticipate the answer and then obtain the parameters forhighest nuclei deuteron A deuteron consists of a neutronand a proton Let us assume one nucleon is fixed and anothernucleon ismoving around the center ofmass At last by usingsingle particle model we investigate the effects of one pionexchange for a single nucleon The Dirac Hamiltonian is
119867 = sdot119875 + 120573 (119898 + 119878) + 119881 minus 119894120573 sdot 119880 (6)
where 119878 is the scalar potential119881 is the vector potential and119880is the tensor partWe have Δ = 119881minus119878 andΣ = 119881+119878TheDiracequation can be solved exactly for the cases Δ = 0 and Σ = 0 sdot
= (
0120590
120590 0
) and 120573 = ( 119868 00 minus119868
)which are the usual Dirac matricesWewill indicate upper and lower components of Dirac spinorwith Ψ
119860
and Ψ119861
Expressing the Dirac matrices in terms ofthe Paulimatrices we obtain the following coupled equations[25 26]
sdot119875Ψ119860
+ (119881 minus 119878 minus 119898)Ψ119861
+ 119894 sdot 119909119880 (119909)Ψ119860
= 119864Ψ119861
(7a)
sdot119875Ψ119861
+ (119881 + 119878 + 119898)Ψ119860
minus 119894 sdot 119909119880 (119909)Ψ119861
= 119864Ψ119860
(7b)
We assume that 119881 119878 and 119880 are radial potentials Using theidentity
sdot119875 =
( sdot )
119909
2
( sdot ) ( sdot119875) =
( sdot )
119909
2
(minus119894119909
120597
120597119909
+ 119894 sdot119871)
(8)
With (7a) and (7b) we find the following second-orderdifferential equations for Ψ
119860
and Ψ119861
119875
2
Ψ119860
+ (119880
2
+
119889119906
119889119909
+
2119906
119909
+
(119889Δ119889119909)
(119864 + 119898 minus Δ)
119880)Ψ119860
+ (4119880 + 2
(119889Δ119889119909)
(119864 + 119898 minus Δ)
)(
119878 sdot
119871
2
)Ψ119860
minus
(119889Δ119889119909)
(119864 + 119898 minus Δ)
120597Ψ119860
120597119909
= (119864 + 119898 minus Δ) (119864 + 119898 minus Σ)Ψ119860
(9a)
119875
2
Ψ119861
+ (119880
2
minus
119889119906
119889119909
minus
2119906
119909
minus
(119889Σ119889119909)
(119864 minus 119898 minus Σ)
119880)Ψ119861
+ (minus4119880 + 2
(119889Σ119889119909)
(119864 minus 119898 minus Σ)
)(
119878 sdot
119871
2
)Ψ119861
+
(119889Σ119889119909)
(119864 minus 119898 minus Δ)
120597Ψ119861
120597119909
= (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ)Ψ119861
(9b)
Here 119878 stands for the (12) spin operator and
119871 for orbitalangular momentum operator The Hamiltonian operatorcommutes with the total angular momentum operator whichis given by
119869 =119871 +
119878 and with the parity operator Therefore
the eigenfunctions defined by Hamiltonian can be expressedas
Ψ119899119895119898119896
= (
119894
119892119899119896
(119909)
119909
120601
119897
119895119898119896
()
119891119899119896
(119909)
119909
120601
119897
119895119898(minus119896)
()
) (10)
where 120601119897119895119898119896
() denotes the spin spherical harmonics Thequantum number 119896 is related to ℓ and 119895 as follows
119896 =
minus (ℓ + 1) = minus (119895 +
1
2
) 119895 = ℓ +
1
2
ℓ = + (119895 +
1
2
) 119895 = ℓ minus
1
2
(11)
ISRN High Energy Physics 3
For spin spherical harmonics we have
sdot 120601
119897
119895119898119896
= 120601
119897
119895119898(minus119896)
(12)
Equations (9a) and (9b) reduced to a set of coupled equationsfor the radial wave functions 119892
119896
and 119891120581
(
119889
2
119889119909
2
minus
119896 (119896 + 1)
119909
2
+
2119896
119909
119880 minus
119889119880
119889119909
minus 119880
2
)119892119896
(119909)
+
119889Δ119889119909
(119864 + 119898 minus Δ)
(
119889
119889119909
+
119896
119909
minus 119880)119892119896
(119909)
= minus (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ) 119892119896
(119909)
(13a)
(
119889
2
119889119909
2
minus
119896 (119896 minus 1)
119909
2
+
2119896
119909
119880 +
119889119880
119889119909
minus 119880
2
)119891119896
(119909)
+
119889Σ119889119909
(119864 minus 119898 minus Δ)
(
119889
119889119909
minus
119896
119909
+ 119880)119891119896
(119909)
= minus (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ)119891119896
(119909)
(13b)
Using the following relations [13]
2119878 sdot
119871 =
119869
2
minus119871
2
minus119878
2
sdot119871120601
119897
119895119898119896
= minus (119896 + 1) 120601
119897
119895119898119896
sdot119871120601
119897
119895119898(minus119896)
= minus (119896 + 1) 120601
119897
119895119898(minus119896)
(14)
for particle of119898mass and 119864 energy we have
119878 = 119881 =
1
2
Σ
Σ (119909) = 119886119909
6
minus 119887119909
5
+ 119888119909
4
minus 119889119909
3
+ 119890119909
2
minus 119891119909 + ℎ minus
119871
119909
Δ (119909) = 0
119880 (119909) = minus
1
119909
(15)
We assume the case 119878(119909) = 119881(119909) [27ndash31] and consider 119896(119896 +1) = ℓ(ℓ+1) then the upper component in (13a) is as follows
(
119889
2
119889119909
2
minus
ℓ (ℓ + 1) + 2 + 2119896
119909
2
minus Σ (119903) (119864 + 119898))119892119896
(119909)
= (119898
2
minus 119864
2
) 119892119896
(119909)
(16)
As we know in deuteron two nucleons have in D-state so
[
119889
2
119889119909
2
minus
ℓ (ℓ + 1) + 2 minus 2 (ℓ + 1)
119909
2
]119892119896
(119909)
= ((1198861
119909
6
minus1198871
119909
5
+1198881
119909
4
minus1198891
119909
3
+1198901
119909
2
minus1198911
119909+ℎ1
minus
1198711
119909
)
minusE)119892119896
(119909)
(17)
Therefore we have a Schrodinger-like equation [31]
119892
10158401015840
1
(119909) = [(1198861
119909
6
minus1198871
119909
5
+1198881
119909
4
minus1198891
119909
3
+1198901
119909
2
minus1198911
119909+ℎ1
minus
1198711
119909
)
minusE +
ℓ (ℓ minus 1)
119909
2
]
(18)
By setting
119886 (1198641
+ 119898) = 1198861
119887 (1198641
+ 119898) = 1198871
119888 (1198641
+ 119898) = 1198881
119889 (1198641
+ 119898) = 1198891
(19)
119890 (1198641
+ 119898) = 1198901
119891 (1198641
+ 119898) = 1198911
ℎ (1198641
+ 119898) = ℎ1
119871 (1198641
+ 119898) = 1198711
(1198641
2
minus 119898
2
) = E
(20)
In order to solve (18) we suppose the following form for thewave function
119892 (119909) = 119872 (119909) 119890
119885(119909)
(21)
Now for the functions119872(119909) and119885(119909) respectively we makeuse of the following ansatz [27 32 33]
119872(119909) =
1 if ground stateV
prod
119894=1
(119909 minus 119886
V119894
) if V gt 0
119885 (119909) = minus
1
4
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909 + 120575 ln119909
(22)
For a particular grand angular quantum number 120574 thereare different solutions which are labeled by 120592 (120592 determinesthe number of the nodes of the wave function) By substitu-tion of119872(119909) and 119885(119909) into (21) and then taking the second-order derivative of the obtained equation we can get
119892
10158401015840
(119909) = [119885
10158401015840
+ 119885
10158402
+
119872
10158401015840
+ 2119872
1015840
119885
1015840
119872
] (23)
We consider the ground state which is called the 0th nodesolution of the above differential equation By equating (18)and (23) for 120592 = 0 it can be found that
120572 = radic1198861
120573 = minus
1198871
2
radic1198861
120578 =
1198881
minus 1205731
2120572
120591 =
minus1198891
minus 2120573120578
2120572
120575 = ℓ minus 1 E = 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(24)
The upper component is as follows
1198921
(119909) = 1198730
119909
ℓminus1 exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909) (25)
and another component of wave function is
1198911
(119909) =
( sdot119875 + 119894 sdot 119880)
(119864 + 119898)
1198921
(119909) (26)
4 ISRN High Energy Physics
By substituting (25) into (26) we obtained the followingequation
1198911
(119909) =
minus119894 sdot
(119864 + 119898)
[
119889
119889119909
minus 119894 sdot119871 minus 119880]119873
0
119909
ℓminus1
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909)
(27)
Therefore the total wave function is
Ψ = 1198730
(
1
minus119894 sdot
(119864 + 119898)
[120572119909
3
+ 120573119909 + 120578119909 + 120591 +
1
119909
]
)
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578 minus 120591119909)
(28)
Now we have to obtain parameters 119886 119887 119888 119889 119890 119891 ℎ and 119871 byusing of (5)
119887 =
14
119896
119886 119888 =
105
119896
2
119886 119889 =
440
119896
3
119886 119890 =
2555
119896
4
119886
119891 =
6846
119896
5
119886 ℎ =
8659
119896
6
119886
(29)
We know that 119896 = 1119909 = 0714 (fmminus1) [34] by using of (24)we can get amount of parameters 120572 120573 120578 and 120591
120572 = radic1198861
120573 = minus98radic1198861
120578 = 8308radic1198861
120591 = 8308radic1198861
(30)
The bonding energy for deuteron is reported 2224MeV [35]This is useful for calculating the numeric values of parametersin (30)
120576 = 119864
2
minus 119898
2
= 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(31)
By substituting the amounts of (31) and ℓ = 1 we obtainedthe numeric values of parameters in (30) The parameters arereported in Table 1 while the parameters of Yukawa potentialare reported in Table 2
4 The Hyperfine Interaction
As the Baryons have spin and isospin the deuteron neutronand proton can interact together We introduce the hyperfineinteraction potential The complete potential is
⟨119867int (119909)⟩ = 119881 (119909) + ⟨119867119878 (119909)⟩ + ⟨119867119868 (119909)⟩ + ⟨119867119878119868 (119909)⟩ (32)
In this work we have added the hyperfine interactionpotentials (119867
119878
(119909) 119867119868
(119909) and119867119878119868
(119909)) which yield propertiesvery close to the experimental results By regarding 119881(119909) asthe nonpertubative potential and the other terms in (32) aspertubative ones according to this explanation The spin andisospin potential contains a 120575-like term We have modified it
by a Gaussian function of the nucleons pair relative distance[36]
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878sum(
119878119894
sdot119878119895
) (33)
where 119878119894
is the spin operator of the 119894th nucleon and 119909 is therelative nucleon pair coordinate 119860
119904
and 120590119878
are constants120590119878
= 287 fm and 119860119878
= 674 fm2 [34 37] We know that thedeuteron consists of two nucleons Where 1 indicate the firstnucleon and 2 indicate the second nucleon We have
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878(
1
2
) [119878
2
minus 119878
2
1
minus 119878
2
2
] (34)
Furthermore we add two hyperfine interaction terms to theHamiltonian nucleon pairs similar to (33) [38]
119867119868
= 119860119878
1
(radic120587120590119868
)
3
119890
minus119909
2120590
2
119868sum(
119868119894
sdot119868119895
) (35)
where 119868119894
is the isospin operator of the 119894th nucleon and theconstants are described as 120590
119868
= 345 fm and 119860119868
= 517 fm2[37 39] The another one is a spin-isospin interaction givenby similar (33) [38 40]
119867119878119868
= 119860119878119868
1
(radic120587120590119878119868
)
3
119890
minus119909
2120590
2
119878119868sum(
119878119894
sdot119878119895
) (119868119894
sdot119868119895
) (36)
The fitted parameters are 120590119878119868
= 231 fm and119860119878119868
= minus1062 fm2[35 41] where 120595
120574
is the perturbed wave function and wewrite it as
120595120574
= 120595
1015840
120574
+ sum
120574
1015840=120574
⟨120595
0
120574
1015840 | 119867int | 1205950
120574
1015840⟩120595
10158400
120574
1015840
119864
0
120574
minus 119864
10158400
120574
(37)
The deuteronmass are given by two nucleonsmasses and theeigenenergies of the Dirac equation119864 (119864 is a function of 120578 120575120591 ℎ119898) with the first-order energy correction from potential119867int can be obtained by using the unperturbed wavefunction(33) (35) and (36)The total potential for the ground state aswell as the other states can be written as [40 42]
⟨119867int⟩ =int120595
lowast
120574
119867in1205951205741199092
119889119909 119889Ω
int120595
lowast
120574
120595120574
119909
2
119889119909 119889Ω
(38)
We first assume 120574 = 0 The potentials can be extracted from(33) (35) and (36)
119867119878
= 010059 (MeV)
119867119868
= 004782 (MeV)
119867119878119868
= minus050053 (MeV)
(39)
Now we can calculate the deuteron mass according to thefollowing formula
119872119863
= 119898119899
+ 119898119901
+ 119864120592120574
+ ⟨119867int⟩ (40)
ISRN High Energy Physics 5
Table 1 The best adaption with experimental value is 1198861
= 306136 120572 = 174967 120573 = minus17146815 120578 = 145362999 120591 =
minus14102380 and 119864 (MeV) = 219020
1198861
120572 120573 120578 120591 119864 (MeV)306131 174965 minus17146628 145361420 minus14102227 289658306134 174967 minus17146785 145362749 minus14102356 249699306135 174967 minus17146805 145362915 minus14102372 234861306136 174967 minus17146815 145362999 minus1410238 21902030638 174967 minus17147648 145377006 minus1410234 183278
Table 2 The value of the Yukawa potential parameters
119886 (fmminus7) 119887 (fmminus6) 119888 (fmminus5) 119889 (fmminus4) 119890 (fmminus3) 119891 (fmminus2) ℎ (fmminus1)021961 430589 4524045 26553556 21597519 81092235 143625603
By substituting119898119899
= 119898119901
= 938 (MeV) = 465 (fmminus1) energyeigenvalue (119864
120592120574
) and the expectation values of119867int in (40) wehave
119872119863
= 187783808 (MeVc2) (41)
By comparing the experimental amount of deuteronmass (119872
119863
= 1875612 (MeVc2) = 929 (fmminus1)) with ourcalculatedmass for deuteronwe found that a good agreementhas been obtained by our model [35]
5 Conclusion
In this work we offer a new approach for the solving ofYukawa potential We expand this potential around of itsmesonic cloud that gets a new form with great powers andinverse exponent We calculate wave function of the Diracequation for a new form of Yukawa potential including acoulomb-like tensor potential By considering the effects ofpertubative interaction potential we see that the theoreticaland experimental masses are in complete agreement Theseimprovements in reproduction of deuteron mass is obtainedby using a suitable form for confinement potential and exactanalytical solution of the Dirac equation for our proposedpotential Finally one can use this model for another nucleiby relativistic or nonrelativistic equation and get the proper-ties of them and the amount of ldquo119892rdquo the strength of nuclearforce
References
[1] H Motavali ldquoBound state solutions of the Dirac equationfor the Scarf-type potential using Nikiforov-Uvarov methodrdquoModern Physics Letters A vol 24 no 15 pp 1227ndash1236 2009
[2] M R Setare and Z Nazari ldquoSolution of Dirac equations withfive-parameter exponent-type potentialrdquo Acta Physica PolonicaB vol 40 no 10 pp 2809ndash2824 2009
[3] L-H Zhang X-P Li and C-S Jia ldquoAnalytical approximationto the solution of the Dirac equation with the Eckart potentialincluding the spin-orbit coupling termrdquo Physics Letters A vol372 no 13 pp 2201ndash2207 2008
[4] C-L Ho ldquoQuasi-exact solvability of Dirac equation withLorentz scalar potentialrdquo Annals of Physics vol 321 no 9 pp2170ndash2182 2006
[5] H Panahi and L Jahangiry ldquoShape invariant and Rodriguessolution of the Dirac-shifted oscillator and Dirac-Morse poten-tialsrdquo International Journal of Theoretical Physics vol 48 no 11pp 3234ndash3240 2009
[6] A D Alhaidari ldquo1198712 series solution of the relativistic Dirac-Morse problem for all energiesrdquo Physics Letters A vol 326 no1-2 pp 58ndash69 2004
[7] F D Adame and M A Gonzalez ldquoSolvable linear potentials inthe Dirac equationrdquo Europhysics Letters vol 13 no 3 pp 193ndash198 1990
[8] A S de Castro and M Hott ldquoExact closed-form solutions ofthe Dirac equation with a scalar exponential potentialrdquo PhysicsLetters A vol 342 no 1-2 pp 53ndash59 2005
[9] Y Chargui A Trabelsi and L Chetouani ldquoExact solution of the(1+1)-dimensional Dirac equationwith vector and scalar linearpotentials in the presence of a minimal lengthrdquo Physics LettersA vol 374 no 4 pp 531ndash534 2010
[10] A S de Castro ldquoBound states of theDirac equation for a class ofeffective quadratic plus inversely quadratic potentialsrdquo Annalsof Physics vol 311 no 1 pp 170ndash181 2004
[11] J-Y Guo J Meng and F-X Xu ldquoSolution of the Dirac equationwith special Hulthen potentialsrdquoChinese Physics Letters vol 20no 5 pp 602ndash604 2003
[12] H Akcay and C Tezcan ldquoExact solutions of the dirac equationwith harmonic oscillator potential including a coulomb-liketensor potentialrdquo International Journal ofModern Physics C vol20 no 6 pp 931ndash940 2009
[13] H Akcay ldquoDirac equation with scalar vector quadratic poten-tials and coulomb-like tensor potentialrdquo Physics Letters A vol373 pp 616ndash620 2009
[14] O Aydogdu and R Sever ldquoExact pseudospin symmetric solu-tion of the Dirac equation for pseudoharmonic potential in thepresence of tensor potentialrdquo Few-Body Systems vol 47 no 3pp 193ndash200 2010
[15] M Eshghi ldquoDirac-Hua problem including a Coulomb-liketensor interactionrdquo Advanced Studies inTheoretical Physics vol5 no 12 pp 559ndash571 2011
[16] G Mao ldquoEffect of tensor couplings in a relativistic Hartreeapproach for finite nucleirdquo Physical Review C vol 67 Article ID044318 12 pages 2003
[17] P Alberto R Lisboa M Malheiro and A S de Castro ldquoTensorcoupling and pseudospin symmetry in nucleirdquo Physical ReviewC vol 71 Article ID 034313 2005
6 ISRN High Energy Physics
[18] R J Furnstahl J J Rusnak and B D Serot ldquoThe nuclear spin-orbit force in chiral effective field theoriesrdquo Nuclear Physics Avol 632 no 4 pp 607ndash623 1998
[19] H Yukawa ldquoOn the interaction of elementary particles IrdquoProceedings of the Physico-Mathematical Society of Japan vol 17pp 48ndash57 1935
[20] H Yukawa ldquoOn the interaction of elementary particles IIrdquoProceedings of the Physico-Mathematical Society of Japan vol 19pp 1084ndash1093 1937
[21] S Zarrinkamar A A Rajabi and H Hassanabadi ldquoDiracequation for the harmonic scalar and vector potentials andlinear plus Coulomb-like tensor potential the SUSY approachrdquoAnnals of Physics vol 325 no 11 pp 2522ndash2528 2010
[22] H Hassanabadi E Maghsoodi S Zarrinkamar and H Rahi-mov ldquoDirac equation for generalized Poschl-Teller scalarand vector potentials and a Coulomb tensor interaction byNikiforov-Uvarov methodrdquo Journal of Mathematical Physicsvol 53 no 2 Article ID 022104 2012
[23] M Moshinsky and A Szczepaniak ldquoThe Dirac oscillatorrdquoJournal of Physics A vol 22 no 17 pp L817ndashL819 1989
[24] H Bahlouli M S Abdelmonem and I M Nasser ldquoAnalyticaltreatment of the Yukawa potentialrdquo Physica Scripta vol 82Article ID 065005 2010
[25] M R Shojaei and A A Rajabi ldquoHypercentral constituent quarkmodel and the hyperfine dependence potentialrdquo Iranian Journalof Physics Research vol 7 no 2 2007
[26] A A Rajabi ldquoA three-body force model for the harmonic andanharmonic oscillatorrdquo Iranian Journal of Physics Research vol5 no 2 2005
[27] N Salehi and A A Rajabi ldquoProton static properties by usinghypercentral constituent quark model and isospinrdquo ModernPhysics Letters A vol 24 no 32 pp 2631ndash2637 2009
[28] A D Alhaidari H Bahlouli and A Al-Hasan ldquoDirac andKlein-Gordon equations with equal scalar and vector poten-tialsrdquo Physics Letters A vol 349 no 1ndash4 pp 87ndash97 2006
[29] A A Rajabi ldquoHypercentral constituent quark model andisospin for the baryon static propertiesrdquo Journal of SciencesIslamic Republic of Iran vol 16 pp 73ndash79 2005
[30] N Salehi and A A Rajabi ldquoA new method for obtaining thespectrum of baryon resonances in the Killingbeck potentialrdquoPhysica Scripta vol 85 Article ID 055101 2012
[31] C-Y Chen ldquoExact solutions of the Dirac equation with scalarand vector Hartmann potentialsrdquo Physics Letters A vol 339 no3-5 pp 283ndash287 2005
[32] A A Rajabi ldquoA method to solve the Schrodinger equationfor any power hypercentral potentialsrdquo Communications inTheoretical Physics vol 48 no 1 pp 151ndash158 2007
[33] N Salehi A A Rajabi and Z Ghalenovi ldquoSpectrum of strangeand nonstrange baryons by using generalized gursey radicatimass formula and hypercentral potentialrdquoActa Physica PolonicaB vol 42 no 6 pp 1247ndash1259 2011
[34] S S M Wong ldquoIntroductory Nuclear Physicsrdquo John Wiley ampSons 1998
[35] N Salehi A A Rajabi and Z Ghalenovi ldquoCalculation ofnonstrange baryon spectra based on symmetry group theoryand the hypercentral potentialrdquo Chinese Journal of Physics vol50 no 1 p 28 2012
[36] L Y Glozman W Plessas K Varga and R F WagenbrunnldquoUnified description of light- and strange-baryon spectrardquoPhysical Review D vol 58 no 9 Article ID 094030 1998
[37] M De Sanctis M M Giannini E Santopinto and A VassalloldquoElectromagnetic form factors in the hypercentral CQMrdquo Euro-pean Physical Journal A vol 19 no 1 pp 81ndash85 2004
[38] L Y Glozman and D O Riska ldquoThe spectrum of the nucleonsand the strange hyperons and chiral dynamicsrdquo Physics Reportvol 268 no 4 pp 263ndash303 1996
[39] M F de la Ripelle ldquoA confining potential for quarksrdquo NuclearPhysics A vol 497 pp 595ndash602 1989
[40] MM Giannini E Santopinto and A Vassallo ldquoAn overview ofthe hypercentral Constituent QuarkModelrdquo Progress in Particleand Nuclear Physics vol 50 no 2 pp 263ndash272 2003
[41] H Hassanabadi ldquoA simple physical approach to study spectrumof baryonsrdquo Communications in Theoretical Physics vol 55 no2 p 303 2011
[42] HHassanabadi A A Rajabi and S Zarrinkamar ldquoSpectrum ofbaryons and spin-isospin dependencerdquo Modern Physics LettersA vol 23 no 7 pp 527ndash537 2008
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
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Superconductivity
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ThermodynamicsJournal of
ISRN High Energy Physics 3
For spin spherical harmonics we have
sdot 120601
119897
119895119898119896
= 120601
119897
119895119898(minus119896)
(12)
Equations (9a) and (9b) reduced to a set of coupled equationsfor the radial wave functions 119892
119896
and 119891120581
(
119889
2
119889119909
2
minus
119896 (119896 + 1)
119909
2
+
2119896
119909
119880 minus
119889119880
119889119909
minus 119880
2
)119892119896
(119909)
+
119889Δ119889119909
(119864 + 119898 minus Δ)
(
119889
119889119909
+
119896
119909
minus 119880)119892119896
(119909)
= minus (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ) 119892119896
(119909)
(13a)
(
119889
2
119889119909
2
minus
119896 (119896 minus 1)
119909
2
+
2119896
119909
119880 +
119889119880
119889119909
minus 119880
2
)119891119896
(119909)
+
119889Σ119889119909
(119864 minus 119898 minus Δ)
(
119889
119889119909
minus
119896
119909
+ 119880)119891119896
(119909)
= minus (119864 + 119898 minus Δ) (119864 minus 119898 minus Σ)119891119896
(119909)
(13b)
Using the following relations [13]
2119878 sdot
119871 =
119869
2
minus119871
2
minus119878
2
sdot119871120601
119897
119895119898119896
= minus (119896 + 1) 120601
119897
119895119898119896
sdot119871120601
119897
119895119898(minus119896)
= minus (119896 + 1) 120601
119897
119895119898(minus119896)
(14)
for particle of119898mass and 119864 energy we have
119878 = 119881 =
1
2
Σ
Σ (119909) = 119886119909
6
minus 119887119909
5
+ 119888119909
4
minus 119889119909
3
+ 119890119909
2
minus 119891119909 + ℎ minus
119871
119909
Δ (119909) = 0
119880 (119909) = minus
1
119909
(15)
We assume the case 119878(119909) = 119881(119909) [27ndash31] and consider 119896(119896 +1) = ℓ(ℓ+1) then the upper component in (13a) is as follows
(
119889
2
119889119909
2
minus
ℓ (ℓ + 1) + 2 + 2119896
119909
2
minus Σ (119903) (119864 + 119898))119892119896
(119909)
= (119898
2
minus 119864
2
) 119892119896
(119909)
(16)
As we know in deuteron two nucleons have in D-state so
[
119889
2
119889119909
2
minus
ℓ (ℓ + 1) + 2 minus 2 (ℓ + 1)
119909
2
]119892119896
(119909)
= ((1198861
119909
6
minus1198871
119909
5
+1198881
119909
4
minus1198891
119909
3
+1198901
119909
2
minus1198911
119909+ℎ1
minus
1198711
119909
)
minusE)119892119896
(119909)
(17)
Therefore we have a Schrodinger-like equation [31]
119892
10158401015840
1
(119909) = [(1198861
119909
6
minus1198871
119909
5
+1198881
119909
4
minus1198891
119909
3
+1198901
119909
2
minus1198911
119909+ℎ1
minus
1198711
119909
)
minusE +
ℓ (ℓ minus 1)
119909
2
]
(18)
By setting
119886 (1198641
+ 119898) = 1198861
119887 (1198641
+ 119898) = 1198871
119888 (1198641
+ 119898) = 1198881
119889 (1198641
+ 119898) = 1198891
(19)
119890 (1198641
+ 119898) = 1198901
119891 (1198641
+ 119898) = 1198911
ℎ (1198641
+ 119898) = ℎ1
119871 (1198641
+ 119898) = 1198711
(1198641
2
minus 119898
2
) = E
(20)
In order to solve (18) we suppose the following form for thewave function
119892 (119909) = 119872 (119909) 119890
119885(119909)
(21)
Now for the functions119872(119909) and119885(119909) respectively we makeuse of the following ansatz [27 32 33]
119872(119909) =
1 if ground stateV
prod
119894=1
(119909 minus 119886
V119894
) if V gt 0
119885 (119909) = minus
1
4
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909 + 120575 ln119909
(22)
For a particular grand angular quantum number 120574 thereare different solutions which are labeled by 120592 (120592 determinesthe number of the nodes of the wave function) By substitu-tion of119872(119909) and 119885(119909) into (21) and then taking the second-order derivative of the obtained equation we can get
119892
10158401015840
(119909) = [119885
10158401015840
+ 119885
10158402
+
119872
10158401015840
+ 2119872
1015840
119885
1015840
119872
] (23)
We consider the ground state which is called the 0th nodesolution of the above differential equation By equating (18)and (23) for 120592 = 0 it can be found that
120572 = radic1198861
120573 = minus
1198871
2
radic1198861
120578 =
1198881
minus 1205731
2120572
120591 =
minus1198891
minus 2120573120578
2120572
120575 = ℓ minus 1 E = 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(24)
The upper component is as follows
1198921
(119909) = 1198730
119909
ℓminus1 exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909) (25)
and another component of wave function is
1198911
(119909) =
( sdot119875 + 119894 sdot 119880)
(119864 + 119898)
1198921
(119909) (26)
4 ISRN High Energy Physics
By substituting (25) into (26) we obtained the followingequation
1198911
(119909) =
minus119894 sdot
(119864 + 119898)
[
119889
119889119909
minus 119894 sdot119871 minus 119880]119873
0
119909
ℓminus1
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909)
(27)
Therefore the total wave function is
Ψ = 1198730
(
1
minus119894 sdot
(119864 + 119898)
[120572119909
3
+ 120573119909 + 120578119909 + 120591 +
1
119909
]
)
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578 minus 120591119909)
(28)
Now we have to obtain parameters 119886 119887 119888 119889 119890 119891 ℎ and 119871 byusing of (5)
119887 =
14
119896
119886 119888 =
105
119896
2
119886 119889 =
440
119896
3
119886 119890 =
2555
119896
4
119886
119891 =
6846
119896
5
119886 ℎ =
8659
119896
6
119886
(29)
We know that 119896 = 1119909 = 0714 (fmminus1) [34] by using of (24)we can get amount of parameters 120572 120573 120578 and 120591
120572 = radic1198861
120573 = minus98radic1198861
120578 = 8308radic1198861
120591 = 8308radic1198861
(30)
The bonding energy for deuteron is reported 2224MeV [35]This is useful for calculating the numeric values of parametersin (30)
120576 = 119864
2
minus 119898
2
= 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(31)
By substituting the amounts of (31) and ℓ = 1 we obtainedthe numeric values of parameters in (30) The parameters arereported in Table 1 while the parameters of Yukawa potentialare reported in Table 2
4 The Hyperfine Interaction
As the Baryons have spin and isospin the deuteron neutronand proton can interact together We introduce the hyperfineinteraction potential The complete potential is
⟨119867int (119909)⟩ = 119881 (119909) + ⟨119867119878 (119909)⟩ + ⟨119867119868 (119909)⟩ + ⟨119867119878119868 (119909)⟩ (32)
In this work we have added the hyperfine interactionpotentials (119867
119878
(119909) 119867119868
(119909) and119867119878119868
(119909)) which yield propertiesvery close to the experimental results By regarding 119881(119909) asthe nonpertubative potential and the other terms in (32) aspertubative ones according to this explanation The spin andisospin potential contains a 120575-like term We have modified it
by a Gaussian function of the nucleons pair relative distance[36]
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878sum(
119878119894
sdot119878119895
) (33)
where 119878119894
is the spin operator of the 119894th nucleon and 119909 is therelative nucleon pair coordinate 119860
119904
and 120590119878
are constants120590119878
= 287 fm and 119860119878
= 674 fm2 [34 37] We know that thedeuteron consists of two nucleons Where 1 indicate the firstnucleon and 2 indicate the second nucleon We have
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878(
1
2
) [119878
2
minus 119878
2
1
minus 119878
2
2
] (34)
Furthermore we add two hyperfine interaction terms to theHamiltonian nucleon pairs similar to (33) [38]
119867119868
= 119860119878
1
(radic120587120590119868
)
3
119890
minus119909
2120590
2
119868sum(
119868119894
sdot119868119895
) (35)
where 119868119894
is the isospin operator of the 119894th nucleon and theconstants are described as 120590
119868
= 345 fm and 119860119868
= 517 fm2[37 39] The another one is a spin-isospin interaction givenby similar (33) [38 40]
119867119878119868
= 119860119878119868
1
(radic120587120590119878119868
)
3
119890
minus119909
2120590
2
119878119868sum(
119878119894
sdot119878119895
) (119868119894
sdot119868119895
) (36)
The fitted parameters are 120590119878119868
= 231 fm and119860119878119868
= minus1062 fm2[35 41] where 120595
120574
is the perturbed wave function and wewrite it as
120595120574
= 120595
1015840
120574
+ sum
120574
1015840=120574
⟨120595
0
120574
1015840 | 119867int | 1205950
120574
1015840⟩120595
10158400
120574
1015840
119864
0
120574
minus 119864
10158400
120574
(37)
The deuteronmass are given by two nucleonsmasses and theeigenenergies of the Dirac equation119864 (119864 is a function of 120578 120575120591 ℎ119898) with the first-order energy correction from potential119867int can be obtained by using the unperturbed wavefunction(33) (35) and (36)The total potential for the ground state aswell as the other states can be written as [40 42]
⟨119867int⟩ =int120595
lowast
120574
119867in1205951205741199092
119889119909 119889Ω
int120595
lowast
120574
120595120574
119909
2
119889119909 119889Ω
(38)
We first assume 120574 = 0 The potentials can be extracted from(33) (35) and (36)
119867119878
= 010059 (MeV)
119867119868
= 004782 (MeV)
119867119878119868
= minus050053 (MeV)
(39)
Now we can calculate the deuteron mass according to thefollowing formula
119872119863
= 119898119899
+ 119898119901
+ 119864120592120574
+ ⟨119867int⟩ (40)
ISRN High Energy Physics 5
Table 1 The best adaption with experimental value is 1198861
= 306136 120572 = 174967 120573 = minus17146815 120578 = 145362999 120591 =
minus14102380 and 119864 (MeV) = 219020
1198861
120572 120573 120578 120591 119864 (MeV)306131 174965 minus17146628 145361420 minus14102227 289658306134 174967 minus17146785 145362749 minus14102356 249699306135 174967 minus17146805 145362915 minus14102372 234861306136 174967 minus17146815 145362999 minus1410238 21902030638 174967 minus17147648 145377006 minus1410234 183278
Table 2 The value of the Yukawa potential parameters
119886 (fmminus7) 119887 (fmminus6) 119888 (fmminus5) 119889 (fmminus4) 119890 (fmminus3) 119891 (fmminus2) ℎ (fmminus1)021961 430589 4524045 26553556 21597519 81092235 143625603
By substituting119898119899
= 119898119901
= 938 (MeV) = 465 (fmminus1) energyeigenvalue (119864
120592120574
) and the expectation values of119867int in (40) wehave
119872119863
= 187783808 (MeVc2) (41)
By comparing the experimental amount of deuteronmass (119872
119863
= 1875612 (MeVc2) = 929 (fmminus1)) with ourcalculatedmass for deuteronwe found that a good agreementhas been obtained by our model [35]
5 Conclusion
In this work we offer a new approach for the solving ofYukawa potential We expand this potential around of itsmesonic cloud that gets a new form with great powers andinverse exponent We calculate wave function of the Diracequation for a new form of Yukawa potential including acoulomb-like tensor potential By considering the effects ofpertubative interaction potential we see that the theoreticaland experimental masses are in complete agreement Theseimprovements in reproduction of deuteron mass is obtainedby using a suitable form for confinement potential and exactanalytical solution of the Dirac equation for our proposedpotential Finally one can use this model for another nucleiby relativistic or nonrelativistic equation and get the proper-ties of them and the amount of ldquo119892rdquo the strength of nuclearforce
References
[1] H Motavali ldquoBound state solutions of the Dirac equationfor the Scarf-type potential using Nikiforov-Uvarov methodrdquoModern Physics Letters A vol 24 no 15 pp 1227ndash1236 2009
[2] M R Setare and Z Nazari ldquoSolution of Dirac equations withfive-parameter exponent-type potentialrdquo Acta Physica PolonicaB vol 40 no 10 pp 2809ndash2824 2009
[3] L-H Zhang X-P Li and C-S Jia ldquoAnalytical approximationto the solution of the Dirac equation with the Eckart potentialincluding the spin-orbit coupling termrdquo Physics Letters A vol372 no 13 pp 2201ndash2207 2008
[4] C-L Ho ldquoQuasi-exact solvability of Dirac equation withLorentz scalar potentialrdquo Annals of Physics vol 321 no 9 pp2170ndash2182 2006
[5] H Panahi and L Jahangiry ldquoShape invariant and Rodriguessolution of the Dirac-shifted oscillator and Dirac-Morse poten-tialsrdquo International Journal of Theoretical Physics vol 48 no 11pp 3234ndash3240 2009
[6] A D Alhaidari ldquo1198712 series solution of the relativistic Dirac-Morse problem for all energiesrdquo Physics Letters A vol 326 no1-2 pp 58ndash69 2004
[7] F D Adame and M A Gonzalez ldquoSolvable linear potentials inthe Dirac equationrdquo Europhysics Letters vol 13 no 3 pp 193ndash198 1990
[8] A S de Castro and M Hott ldquoExact closed-form solutions ofthe Dirac equation with a scalar exponential potentialrdquo PhysicsLetters A vol 342 no 1-2 pp 53ndash59 2005
[9] Y Chargui A Trabelsi and L Chetouani ldquoExact solution of the(1+1)-dimensional Dirac equationwith vector and scalar linearpotentials in the presence of a minimal lengthrdquo Physics LettersA vol 374 no 4 pp 531ndash534 2010
[10] A S de Castro ldquoBound states of theDirac equation for a class ofeffective quadratic plus inversely quadratic potentialsrdquo Annalsof Physics vol 311 no 1 pp 170ndash181 2004
[11] J-Y Guo J Meng and F-X Xu ldquoSolution of the Dirac equationwith special Hulthen potentialsrdquoChinese Physics Letters vol 20no 5 pp 602ndash604 2003
[12] H Akcay and C Tezcan ldquoExact solutions of the dirac equationwith harmonic oscillator potential including a coulomb-liketensor potentialrdquo International Journal ofModern Physics C vol20 no 6 pp 931ndash940 2009
[13] H Akcay ldquoDirac equation with scalar vector quadratic poten-tials and coulomb-like tensor potentialrdquo Physics Letters A vol373 pp 616ndash620 2009
[14] O Aydogdu and R Sever ldquoExact pseudospin symmetric solu-tion of the Dirac equation for pseudoharmonic potential in thepresence of tensor potentialrdquo Few-Body Systems vol 47 no 3pp 193ndash200 2010
[15] M Eshghi ldquoDirac-Hua problem including a Coulomb-liketensor interactionrdquo Advanced Studies inTheoretical Physics vol5 no 12 pp 559ndash571 2011
[16] G Mao ldquoEffect of tensor couplings in a relativistic Hartreeapproach for finite nucleirdquo Physical Review C vol 67 Article ID044318 12 pages 2003
[17] P Alberto R Lisboa M Malheiro and A S de Castro ldquoTensorcoupling and pseudospin symmetry in nucleirdquo Physical ReviewC vol 71 Article ID 034313 2005
6 ISRN High Energy Physics
[18] R J Furnstahl J J Rusnak and B D Serot ldquoThe nuclear spin-orbit force in chiral effective field theoriesrdquo Nuclear Physics Avol 632 no 4 pp 607ndash623 1998
[19] H Yukawa ldquoOn the interaction of elementary particles IrdquoProceedings of the Physico-Mathematical Society of Japan vol 17pp 48ndash57 1935
[20] H Yukawa ldquoOn the interaction of elementary particles IIrdquoProceedings of the Physico-Mathematical Society of Japan vol 19pp 1084ndash1093 1937
[21] S Zarrinkamar A A Rajabi and H Hassanabadi ldquoDiracequation for the harmonic scalar and vector potentials andlinear plus Coulomb-like tensor potential the SUSY approachrdquoAnnals of Physics vol 325 no 11 pp 2522ndash2528 2010
[22] H Hassanabadi E Maghsoodi S Zarrinkamar and H Rahi-mov ldquoDirac equation for generalized Poschl-Teller scalarand vector potentials and a Coulomb tensor interaction byNikiforov-Uvarov methodrdquo Journal of Mathematical Physicsvol 53 no 2 Article ID 022104 2012
[23] M Moshinsky and A Szczepaniak ldquoThe Dirac oscillatorrdquoJournal of Physics A vol 22 no 17 pp L817ndashL819 1989
[24] H Bahlouli M S Abdelmonem and I M Nasser ldquoAnalyticaltreatment of the Yukawa potentialrdquo Physica Scripta vol 82Article ID 065005 2010
[25] M R Shojaei and A A Rajabi ldquoHypercentral constituent quarkmodel and the hyperfine dependence potentialrdquo Iranian Journalof Physics Research vol 7 no 2 2007
[26] A A Rajabi ldquoA three-body force model for the harmonic andanharmonic oscillatorrdquo Iranian Journal of Physics Research vol5 no 2 2005
[27] N Salehi and A A Rajabi ldquoProton static properties by usinghypercentral constituent quark model and isospinrdquo ModernPhysics Letters A vol 24 no 32 pp 2631ndash2637 2009
[28] A D Alhaidari H Bahlouli and A Al-Hasan ldquoDirac andKlein-Gordon equations with equal scalar and vector poten-tialsrdquo Physics Letters A vol 349 no 1ndash4 pp 87ndash97 2006
[29] A A Rajabi ldquoHypercentral constituent quark model andisospin for the baryon static propertiesrdquo Journal of SciencesIslamic Republic of Iran vol 16 pp 73ndash79 2005
[30] N Salehi and A A Rajabi ldquoA new method for obtaining thespectrum of baryon resonances in the Killingbeck potentialrdquoPhysica Scripta vol 85 Article ID 055101 2012
[31] C-Y Chen ldquoExact solutions of the Dirac equation with scalarand vector Hartmann potentialsrdquo Physics Letters A vol 339 no3-5 pp 283ndash287 2005
[32] A A Rajabi ldquoA method to solve the Schrodinger equationfor any power hypercentral potentialsrdquo Communications inTheoretical Physics vol 48 no 1 pp 151ndash158 2007
[33] N Salehi A A Rajabi and Z Ghalenovi ldquoSpectrum of strangeand nonstrange baryons by using generalized gursey radicatimass formula and hypercentral potentialrdquoActa Physica PolonicaB vol 42 no 6 pp 1247ndash1259 2011
[34] S S M Wong ldquoIntroductory Nuclear Physicsrdquo John Wiley ampSons 1998
[35] N Salehi A A Rajabi and Z Ghalenovi ldquoCalculation ofnonstrange baryon spectra based on symmetry group theoryand the hypercentral potentialrdquo Chinese Journal of Physics vol50 no 1 p 28 2012
[36] L Y Glozman W Plessas K Varga and R F WagenbrunnldquoUnified description of light- and strange-baryon spectrardquoPhysical Review D vol 58 no 9 Article ID 094030 1998
[37] M De Sanctis M M Giannini E Santopinto and A VassalloldquoElectromagnetic form factors in the hypercentral CQMrdquo Euro-pean Physical Journal A vol 19 no 1 pp 81ndash85 2004
[38] L Y Glozman and D O Riska ldquoThe spectrum of the nucleonsand the strange hyperons and chiral dynamicsrdquo Physics Reportvol 268 no 4 pp 263ndash303 1996
[39] M F de la Ripelle ldquoA confining potential for quarksrdquo NuclearPhysics A vol 497 pp 595ndash602 1989
[40] MM Giannini E Santopinto and A Vassallo ldquoAn overview ofthe hypercentral Constituent QuarkModelrdquo Progress in Particleand Nuclear Physics vol 50 no 2 pp 263ndash272 2003
[41] H Hassanabadi ldquoA simple physical approach to study spectrumof baryonsrdquo Communications in Theoretical Physics vol 55 no2 p 303 2011
[42] HHassanabadi A A Rajabi and S Zarrinkamar ldquoSpectrum ofbaryons and spin-isospin dependencerdquo Modern Physics LettersA vol 23 no 7 pp 527ndash537 2008
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
High Energy PhysicsAdvances in
The Scientific World JournalHindawi Publishing Corporation httpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
FluidsJournal of
Atomic and Molecular Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Advances in Condensed Matter Physics
OpticsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstronomyAdvances in
International Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Superconductivity
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Statistical MechanicsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
GravityJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstrophysicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Physics Research International
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Solid State PhysicsJournal of
Computational Methods in Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Soft MatterJournal of
Hindawi Publishing Corporationhttpwwwhindawicom
AerodynamicsJournal of
Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
PhotonicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Journal of
Biophysics
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
ThermodynamicsJournal of
4 ISRN High Energy Physics
By substituting (25) into (26) we obtained the followingequation
1198911
(119909) =
minus119894 sdot
(119864 + 119898)
[
119889
119889119909
minus 119894 sdot119871 minus 119880]119873
0
119909
ℓminus1
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578119909
2
minus 120591119909)
(27)
Therefore the total wave function is
Ψ = 1198730
(
1
minus119894 sdot
(119864 + 119898)
[120572119909
3
+ 120573119909 + 120578119909 + 120591 +
1
119909
]
)
times exp(minus14
120572119909
4
minus
1
3
120573119909
3
minus
1
2
120578 minus 120591119909)
(28)
Now we have to obtain parameters 119886 119887 119888 119889 119890 119891 ℎ and 119871 byusing of (5)
119887 =
14
119896
119886 119888 =
105
119896
2
119886 119889 =
440
119896
3
119886 119890 =
2555
119896
4
119886
119891 =
6846
119896
5
119886 ℎ =
8659
119896
6
119886
(29)
We know that 119896 = 1119909 = 0714 (fmminus1) [34] by using of (24)we can get amount of parameters 120572 120573 120578 and 120591
120572 = radic1198861
120573 = minus98radic1198861
120578 = 8308radic1198861
120591 = 8308radic1198861
(30)
The bonding energy for deuteron is reported 2224MeV [35]This is useful for calculating the numeric values of parametersin (30)
120576 = 119864
2
minus 119898
2
= 120578 (1 minus 2120575) minus 120591
2
minus ℎ1
(31)
By substituting the amounts of (31) and ℓ = 1 we obtainedthe numeric values of parameters in (30) The parameters arereported in Table 1 while the parameters of Yukawa potentialare reported in Table 2
4 The Hyperfine Interaction
As the Baryons have spin and isospin the deuteron neutronand proton can interact together We introduce the hyperfineinteraction potential The complete potential is
⟨119867int (119909)⟩ = 119881 (119909) + ⟨119867119878 (119909)⟩ + ⟨119867119868 (119909)⟩ + ⟨119867119878119868 (119909)⟩ (32)
In this work we have added the hyperfine interactionpotentials (119867
119878
(119909) 119867119868
(119909) and119867119878119868
(119909)) which yield propertiesvery close to the experimental results By regarding 119881(119909) asthe nonpertubative potential and the other terms in (32) aspertubative ones according to this explanation The spin andisospin potential contains a 120575-like term We have modified it
by a Gaussian function of the nucleons pair relative distance[36]
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878sum(
119878119894
sdot119878119895
) (33)
where 119878119894
is the spin operator of the 119894th nucleon and 119909 is therelative nucleon pair coordinate 119860
119904
and 120590119878
are constants120590119878
= 287 fm and 119860119878
= 674 fm2 [34 37] We know that thedeuteron consists of two nucleons Where 1 indicate the firstnucleon and 2 indicate the second nucleon We have
119867119878
= 119860119878
1
(radic120587120590119878
)
3
119890
minus119909
2120590
2
119878(
1
2
) [119878
2
minus 119878
2
1
minus 119878
2
2
] (34)
Furthermore we add two hyperfine interaction terms to theHamiltonian nucleon pairs similar to (33) [38]
119867119868
= 119860119878
1
(radic120587120590119868
)
3
119890
minus119909
2120590
2
119868sum(
119868119894
sdot119868119895
) (35)
where 119868119894
is the isospin operator of the 119894th nucleon and theconstants are described as 120590
119868
= 345 fm and 119860119868
= 517 fm2[37 39] The another one is a spin-isospin interaction givenby similar (33) [38 40]
119867119878119868
= 119860119878119868
1
(radic120587120590119878119868
)
3
119890
minus119909
2120590
2
119878119868sum(
119878119894
sdot119878119895
) (119868119894
sdot119868119895
) (36)
The fitted parameters are 120590119878119868
= 231 fm and119860119878119868
= minus1062 fm2[35 41] where 120595
120574
is the perturbed wave function and wewrite it as
120595120574
= 120595
1015840
120574
+ sum
120574
1015840=120574
⟨120595
0
120574
1015840 | 119867int | 1205950
120574
1015840⟩120595
10158400
120574
1015840
119864
0
120574
minus 119864
10158400
120574
(37)
The deuteronmass are given by two nucleonsmasses and theeigenenergies of the Dirac equation119864 (119864 is a function of 120578 120575120591 ℎ119898) with the first-order energy correction from potential119867int can be obtained by using the unperturbed wavefunction(33) (35) and (36)The total potential for the ground state aswell as the other states can be written as [40 42]
⟨119867int⟩ =int120595
lowast
120574
119867in1205951205741199092
119889119909 119889Ω
int120595
lowast
120574
120595120574
119909
2
119889119909 119889Ω
(38)
We first assume 120574 = 0 The potentials can be extracted from(33) (35) and (36)
119867119878
= 010059 (MeV)
119867119868
= 004782 (MeV)
119867119878119868
= minus050053 (MeV)
(39)
Now we can calculate the deuteron mass according to thefollowing formula
119872119863
= 119898119899
+ 119898119901
+ 119864120592120574
+ ⟨119867int⟩ (40)
ISRN High Energy Physics 5
Table 1 The best adaption with experimental value is 1198861
= 306136 120572 = 174967 120573 = minus17146815 120578 = 145362999 120591 =
minus14102380 and 119864 (MeV) = 219020
1198861
120572 120573 120578 120591 119864 (MeV)306131 174965 minus17146628 145361420 minus14102227 289658306134 174967 minus17146785 145362749 minus14102356 249699306135 174967 minus17146805 145362915 minus14102372 234861306136 174967 minus17146815 145362999 minus1410238 21902030638 174967 minus17147648 145377006 minus1410234 183278
Table 2 The value of the Yukawa potential parameters
119886 (fmminus7) 119887 (fmminus6) 119888 (fmminus5) 119889 (fmminus4) 119890 (fmminus3) 119891 (fmminus2) ℎ (fmminus1)021961 430589 4524045 26553556 21597519 81092235 143625603
By substituting119898119899
= 119898119901
= 938 (MeV) = 465 (fmminus1) energyeigenvalue (119864
120592120574
) and the expectation values of119867int in (40) wehave
119872119863
= 187783808 (MeVc2) (41)
By comparing the experimental amount of deuteronmass (119872
119863
= 1875612 (MeVc2) = 929 (fmminus1)) with ourcalculatedmass for deuteronwe found that a good agreementhas been obtained by our model [35]
5 Conclusion
In this work we offer a new approach for the solving ofYukawa potential We expand this potential around of itsmesonic cloud that gets a new form with great powers andinverse exponent We calculate wave function of the Diracequation for a new form of Yukawa potential including acoulomb-like tensor potential By considering the effects ofpertubative interaction potential we see that the theoreticaland experimental masses are in complete agreement Theseimprovements in reproduction of deuteron mass is obtainedby using a suitable form for confinement potential and exactanalytical solution of the Dirac equation for our proposedpotential Finally one can use this model for another nucleiby relativistic or nonrelativistic equation and get the proper-ties of them and the amount of ldquo119892rdquo the strength of nuclearforce
References
[1] H Motavali ldquoBound state solutions of the Dirac equationfor the Scarf-type potential using Nikiforov-Uvarov methodrdquoModern Physics Letters A vol 24 no 15 pp 1227ndash1236 2009
[2] M R Setare and Z Nazari ldquoSolution of Dirac equations withfive-parameter exponent-type potentialrdquo Acta Physica PolonicaB vol 40 no 10 pp 2809ndash2824 2009
[3] L-H Zhang X-P Li and C-S Jia ldquoAnalytical approximationto the solution of the Dirac equation with the Eckart potentialincluding the spin-orbit coupling termrdquo Physics Letters A vol372 no 13 pp 2201ndash2207 2008
[4] C-L Ho ldquoQuasi-exact solvability of Dirac equation withLorentz scalar potentialrdquo Annals of Physics vol 321 no 9 pp2170ndash2182 2006
[5] H Panahi and L Jahangiry ldquoShape invariant and Rodriguessolution of the Dirac-shifted oscillator and Dirac-Morse poten-tialsrdquo International Journal of Theoretical Physics vol 48 no 11pp 3234ndash3240 2009
[6] A D Alhaidari ldquo1198712 series solution of the relativistic Dirac-Morse problem for all energiesrdquo Physics Letters A vol 326 no1-2 pp 58ndash69 2004
[7] F D Adame and M A Gonzalez ldquoSolvable linear potentials inthe Dirac equationrdquo Europhysics Letters vol 13 no 3 pp 193ndash198 1990
[8] A S de Castro and M Hott ldquoExact closed-form solutions ofthe Dirac equation with a scalar exponential potentialrdquo PhysicsLetters A vol 342 no 1-2 pp 53ndash59 2005
[9] Y Chargui A Trabelsi and L Chetouani ldquoExact solution of the(1+1)-dimensional Dirac equationwith vector and scalar linearpotentials in the presence of a minimal lengthrdquo Physics LettersA vol 374 no 4 pp 531ndash534 2010
[10] A S de Castro ldquoBound states of theDirac equation for a class ofeffective quadratic plus inversely quadratic potentialsrdquo Annalsof Physics vol 311 no 1 pp 170ndash181 2004
[11] J-Y Guo J Meng and F-X Xu ldquoSolution of the Dirac equationwith special Hulthen potentialsrdquoChinese Physics Letters vol 20no 5 pp 602ndash604 2003
[12] H Akcay and C Tezcan ldquoExact solutions of the dirac equationwith harmonic oscillator potential including a coulomb-liketensor potentialrdquo International Journal ofModern Physics C vol20 no 6 pp 931ndash940 2009
[13] H Akcay ldquoDirac equation with scalar vector quadratic poten-tials and coulomb-like tensor potentialrdquo Physics Letters A vol373 pp 616ndash620 2009
[14] O Aydogdu and R Sever ldquoExact pseudospin symmetric solu-tion of the Dirac equation for pseudoharmonic potential in thepresence of tensor potentialrdquo Few-Body Systems vol 47 no 3pp 193ndash200 2010
[15] M Eshghi ldquoDirac-Hua problem including a Coulomb-liketensor interactionrdquo Advanced Studies inTheoretical Physics vol5 no 12 pp 559ndash571 2011
[16] G Mao ldquoEffect of tensor couplings in a relativistic Hartreeapproach for finite nucleirdquo Physical Review C vol 67 Article ID044318 12 pages 2003
[17] P Alberto R Lisboa M Malheiro and A S de Castro ldquoTensorcoupling and pseudospin symmetry in nucleirdquo Physical ReviewC vol 71 Article ID 034313 2005
6 ISRN High Energy Physics
[18] R J Furnstahl J J Rusnak and B D Serot ldquoThe nuclear spin-orbit force in chiral effective field theoriesrdquo Nuclear Physics Avol 632 no 4 pp 607ndash623 1998
[19] H Yukawa ldquoOn the interaction of elementary particles IrdquoProceedings of the Physico-Mathematical Society of Japan vol 17pp 48ndash57 1935
[20] H Yukawa ldquoOn the interaction of elementary particles IIrdquoProceedings of the Physico-Mathematical Society of Japan vol 19pp 1084ndash1093 1937
[21] S Zarrinkamar A A Rajabi and H Hassanabadi ldquoDiracequation for the harmonic scalar and vector potentials andlinear plus Coulomb-like tensor potential the SUSY approachrdquoAnnals of Physics vol 325 no 11 pp 2522ndash2528 2010
[22] H Hassanabadi E Maghsoodi S Zarrinkamar and H Rahi-mov ldquoDirac equation for generalized Poschl-Teller scalarand vector potentials and a Coulomb tensor interaction byNikiforov-Uvarov methodrdquo Journal of Mathematical Physicsvol 53 no 2 Article ID 022104 2012
[23] M Moshinsky and A Szczepaniak ldquoThe Dirac oscillatorrdquoJournal of Physics A vol 22 no 17 pp L817ndashL819 1989
[24] H Bahlouli M S Abdelmonem and I M Nasser ldquoAnalyticaltreatment of the Yukawa potentialrdquo Physica Scripta vol 82Article ID 065005 2010
[25] M R Shojaei and A A Rajabi ldquoHypercentral constituent quarkmodel and the hyperfine dependence potentialrdquo Iranian Journalof Physics Research vol 7 no 2 2007
[26] A A Rajabi ldquoA three-body force model for the harmonic andanharmonic oscillatorrdquo Iranian Journal of Physics Research vol5 no 2 2005
[27] N Salehi and A A Rajabi ldquoProton static properties by usinghypercentral constituent quark model and isospinrdquo ModernPhysics Letters A vol 24 no 32 pp 2631ndash2637 2009
[28] A D Alhaidari H Bahlouli and A Al-Hasan ldquoDirac andKlein-Gordon equations with equal scalar and vector poten-tialsrdquo Physics Letters A vol 349 no 1ndash4 pp 87ndash97 2006
[29] A A Rajabi ldquoHypercentral constituent quark model andisospin for the baryon static propertiesrdquo Journal of SciencesIslamic Republic of Iran vol 16 pp 73ndash79 2005
[30] N Salehi and A A Rajabi ldquoA new method for obtaining thespectrum of baryon resonances in the Killingbeck potentialrdquoPhysica Scripta vol 85 Article ID 055101 2012
[31] C-Y Chen ldquoExact solutions of the Dirac equation with scalarand vector Hartmann potentialsrdquo Physics Letters A vol 339 no3-5 pp 283ndash287 2005
[32] A A Rajabi ldquoA method to solve the Schrodinger equationfor any power hypercentral potentialsrdquo Communications inTheoretical Physics vol 48 no 1 pp 151ndash158 2007
[33] N Salehi A A Rajabi and Z Ghalenovi ldquoSpectrum of strangeand nonstrange baryons by using generalized gursey radicatimass formula and hypercentral potentialrdquoActa Physica PolonicaB vol 42 no 6 pp 1247ndash1259 2011
[34] S S M Wong ldquoIntroductory Nuclear Physicsrdquo John Wiley ampSons 1998
[35] N Salehi A A Rajabi and Z Ghalenovi ldquoCalculation ofnonstrange baryon spectra based on symmetry group theoryand the hypercentral potentialrdquo Chinese Journal of Physics vol50 no 1 p 28 2012
[36] L Y Glozman W Plessas K Varga and R F WagenbrunnldquoUnified description of light- and strange-baryon spectrardquoPhysical Review D vol 58 no 9 Article ID 094030 1998
[37] M De Sanctis M M Giannini E Santopinto and A VassalloldquoElectromagnetic form factors in the hypercentral CQMrdquo Euro-pean Physical Journal A vol 19 no 1 pp 81ndash85 2004
[38] L Y Glozman and D O Riska ldquoThe spectrum of the nucleonsand the strange hyperons and chiral dynamicsrdquo Physics Reportvol 268 no 4 pp 263ndash303 1996
[39] M F de la Ripelle ldquoA confining potential for quarksrdquo NuclearPhysics A vol 497 pp 595ndash602 1989
[40] MM Giannini E Santopinto and A Vassallo ldquoAn overview ofthe hypercentral Constituent QuarkModelrdquo Progress in Particleand Nuclear Physics vol 50 no 2 pp 263ndash272 2003
[41] H Hassanabadi ldquoA simple physical approach to study spectrumof baryonsrdquo Communications in Theoretical Physics vol 55 no2 p 303 2011
[42] HHassanabadi A A Rajabi and S Zarrinkamar ldquoSpectrum ofbaryons and spin-isospin dependencerdquo Modern Physics LettersA vol 23 no 7 pp 527ndash537 2008
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
High Energy PhysicsAdvances in
The Scientific World JournalHindawi Publishing Corporation httpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
FluidsJournal of
Atomic and Molecular Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Advances in Condensed Matter Physics
OpticsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstronomyAdvances in
International Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Superconductivity
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Statistical MechanicsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
GravityJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstrophysicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Physics Research International
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Solid State PhysicsJournal of
Computational Methods in Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Soft MatterJournal of
Hindawi Publishing Corporationhttpwwwhindawicom
AerodynamicsJournal of
Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
PhotonicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Journal of
Biophysics
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
ThermodynamicsJournal of
ISRN High Energy Physics 5
Table 1 The best adaption with experimental value is 1198861
= 306136 120572 = 174967 120573 = minus17146815 120578 = 145362999 120591 =
minus14102380 and 119864 (MeV) = 219020
1198861
120572 120573 120578 120591 119864 (MeV)306131 174965 minus17146628 145361420 minus14102227 289658306134 174967 minus17146785 145362749 minus14102356 249699306135 174967 minus17146805 145362915 minus14102372 234861306136 174967 minus17146815 145362999 minus1410238 21902030638 174967 minus17147648 145377006 minus1410234 183278
Table 2 The value of the Yukawa potential parameters
119886 (fmminus7) 119887 (fmminus6) 119888 (fmminus5) 119889 (fmminus4) 119890 (fmminus3) 119891 (fmminus2) ℎ (fmminus1)021961 430589 4524045 26553556 21597519 81092235 143625603
By substituting119898119899
= 119898119901
= 938 (MeV) = 465 (fmminus1) energyeigenvalue (119864
120592120574
) and the expectation values of119867int in (40) wehave
119872119863
= 187783808 (MeVc2) (41)
By comparing the experimental amount of deuteronmass (119872
119863
= 1875612 (MeVc2) = 929 (fmminus1)) with ourcalculatedmass for deuteronwe found that a good agreementhas been obtained by our model [35]
5 Conclusion
In this work we offer a new approach for the solving ofYukawa potential We expand this potential around of itsmesonic cloud that gets a new form with great powers andinverse exponent We calculate wave function of the Diracequation for a new form of Yukawa potential including acoulomb-like tensor potential By considering the effects ofpertubative interaction potential we see that the theoreticaland experimental masses are in complete agreement Theseimprovements in reproduction of deuteron mass is obtainedby using a suitable form for confinement potential and exactanalytical solution of the Dirac equation for our proposedpotential Finally one can use this model for another nucleiby relativistic or nonrelativistic equation and get the proper-ties of them and the amount of ldquo119892rdquo the strength of nuclearforce
References
[1] H Motavali ldquoBound state solutions of the Dirac equationfor the Scarf-type potential using Nikiforov-Uvarov methodrdquoModern Physics Letters A vol 24 no 15 pp 1227ndash1236 2009
[2] M R Setare and Z Nazari ldquoSolution of Dirac equations withfive-parameter exponent-type potentialrdquo Acta Physica PolonicaB vol 40 no 10 pp 2809ndash2824 2009
[3] L-H Zhang X-P Li and C-S Jia ldquoAnalytical approximationto the solution of the Dirac equation with the Eckart potentialincluding the spin-orbit coupling termrdquo Physics Letters A vol372 no 13 pp 2201ndash2207 2008
[4] C-L Ho ldquoQuasi-exact solvability of Dirac equation withLorentz scalar potentialrdquo Annals of Physics vol 321 no 9 pp2170ndash2182 2006
[5] H Panahi and L Jahangiry ldquoShape invariant and Rodriguessolution of the Dirac-shifted oscillator and Dirac-Morse poten-tialsrdquo International Journal of Theoretical Physics vol 48 no 11pp 3234ndash3240 2009
[6] A D Alhaidari ldquo1198712 series solution of the relativistic Dirac-Morse problem for all energiesrdquo Physics Letters A vol 326 no1-2 pp 58ndash69 2004
[7] F D Adame and M A Gonzalez ldquoSolvable linear potentials inthe Dirac equationrdquo Europhysics Letters vol 13 no 3 pp 193ndash198 1990
[8] A S de Castro and M Hott ldquoExact closed-form solutions ofthe Dirac equation with a scalar exponential potentialrdquo PhysicsLetters A vol 342 no 1-2 pp 53ndash59 2005
[9] Y Chargui A Trabelsi and L Chetouani ldquoExact solution of the(1+1)-dimensional Dirac equationwith vector and scalar linearpotentials in the presence of a minimal lengthrdquo Physics LettersA vol 374 no 4 pp 531ndash534 2010
[10] A S de Castro ldquoBound states of theDirac equation for a class ofeffective quadratic plus inversely quadratic potentialsrdquo Annalsof Physics vol 311 no 1 pp 170ndash181 2004
[11] J-Y Guo J Meng and F-X Xu ldquoSolution of the Dirac equationwith special Hulthen potentialsrdquoChinese Physics Letters vol 20no 5 pp 602ndash604 2003
[12] H Akcay and C Tezcan ldquoExact solutions of the dirac equationwith harmonic oscillator potential including a coulomb-liketensor potentialrdquo International Journal ofModern Physics C vol20 no 6 pp 931ndash940 2009
[13] H Akcay ldquoDirac equation with scalar vector quadratic poten-tials and coulomb-like tensor potentialrdquo Physics Letters A vol373 pp 616ndash620 2009
[14] O Aydogdu and R Sever ldquoExact pseudospin symmetric solu-tion of the Dirac equation for pseudoharmonic potential in thepresence of tensor potentialrdquo Few-Body Systems vol 47 no 3pp 193ndash200 2010
[15] M Eshghi ldquoDirac-Hua problem including a Coulomb-liketensor interactionrdquo Advanced Studies inTheoretical Physics vol5 no 12 pp 559ndash571 2011
[16] G Mao ldquoEffect of tensor couplings in a relativistic Hartreeapproach for finite nucleirdquo Physical Review C vol 67 Article ID044318 12 pages 2003
[17] P Alberto R Lisboa M Malheiro and A S de Castro ldquoTensorcoupling and pseudospin symmetry in nucleirdquo Physical ReviewC vol 71 Article ID 034313 2005
6 ISRN High Energy Physics
[18] R J Furnstahl J J Rusnak and B D Serot ldquoThe nuclear spin-orbit force in chiral effective field theoriesrdquo Nuclear Physics Avol 632 no 4 pp 607ndash623 1998
[19] H Yukawa ldquoOn the interaction of elementary particles IrdquoProceedings of the Physico-Mathematical Society of Japan vol 17pp 48ndash57 1935
[20] H Yukawa ldquoOn the interaction of elementary particles IIrdquoProceedings of the Physico-Mathematical Society of Japan vol 19pp 1084ndash1093 1937
[21] S Zarrinkamar A A Rajabi and H Hassanabadi ldquoDiracequation for the harmonic scalar and vector potentials andlinear plus Coulomb-like tensor potential the SUSY approachrdquoAnnals of Physics vol 325 no 11 pp 2522ndash2528 2010
[22] H Hassanabadi E Maghsoodi S Zarrinkamar and H Rahi-mov ldquoDirac equation for generalized Poschl-Teller scalarand vector potentials and a Coulomb tensor interaction byNikiforov-Uvarov methodrdquo Journal of Mathematical Physicsvol 53 no 2 Article ID 022104 2012
[23] M Moshinsky and A Szczepaniak ldquoThe Dirac oscillatorrdquoJournal of Physics A vol 22 no 17 pp L817ndashL819 1989
[24] H Bahlouli M S Abdelmonem and I M Nasser ldquoAnalyticaltreatment of the Yukawa potentialrdquo Physica Scripta vol 82Article ID 065005 2010
[25] M R Shojaei and A A Rajabi ldquoHypercentral constituent quarkmodel and the hyperfine dependence potentialrdquo Iranian Journalof Physics Research vol 7 no 2 2007
[26] A A Rajabi ldquoA three-body force model for the harmonic andanharmonic oscillatorrdquo Iranian Journal of Physics Research vol5 no 2 2005
[27] N Salehi and A A Rajabi ldquoProton static properties by usinghypercentral constituent quark model and isospinrdquo ModernPhysics Letters A vol 24 no 32 pp 2631ndash2637 2009
[28] A D Alhaidari H Bahlouli and A Al-Hasan ldquoDirac andKlein-Gordon equations with equal scalar and vector poten-tialsrdquo Physics Letters A vol 349 no 1ndash4 pp 87ndash97 2006
[29] A A Rajabi ldquoHypercentral constituent quark model andisospin for the baryon static propertiesrdquo Journal of SciencesIslamic Republic of Iran vol 16 pp 73ndash79 2005
[30] N Salehi and A A Rajabi ldquoA new method for obtaining thespectrum of baryon resonances in the Killingbeck potentialrdquoPhysica Scripta vol 85 Article ID 055101 2012
[31] C-Y Chen ldquoExact solutions of the Dirac equation with scalarand vector Hartmann potentialsrdquo Physics Letters A vol 339 no3-5 pp 283ndash287 2005
[32] A A Rajabi ldquoA method to solve the Schrodinger equationfor any power hypercentral potentialsrdquo Communications inTheoretical Physics vol 48 no 1 pp 151ndash158 2007
[33] N Salehi A A Rajabi and Z Ghalenovi ldquoSpectrum of strangeand nonstrange baryons by using generalized gursey radicatimass formula and hypercentral potentialrdquoActa Physica PolonicaB vol 42 no 6 pp 1247ndash1259 2011
[34] S S M Wong ldquoIntroductory Nuclear Physicsrdquo John Wiley ampSons 1998
[35] N Salehi A A Rajabi and Z Ghalenovi ldquoCalculation ofnonstrange baryon spectra based on symmetry group theoryand the hypercentral potentialrdquo Chinese Journal of Physics vol50 no 1 p 28 2012
[36] L Y Glozman W Plessas K Varga and R F WagenbrunnldquoUnified description of light- and strange-baryon spectrardquoPhysical Review D vol 58 no 9 Article ID 094030 1998
[37] M De Sanctis M M Giannini E Santopinto and A VassalloldquoElectromagnetic form factors in the hypercentral CQMrdquo Euro-pean Physical Journal A vol 19 no 1 pp 81ndash85 2004
[38] L Y Glozman and D O Riska ldquoThe spectrum of the nucleonsand the strange hyperons and chiral dynamicsrdquo Physics Reportvol 268 no 4 pp 263ndash303 1996
[39] M F de la Ripelle ldquoA confining potential for quarksrdquo NuclearPhysics A vol 497 pp 595ndash602 1989
[40] MM Giannini E Santopinto and A Vassallo ldquoAn overview ofthe hypercentral Constituent QuarkModelrdquo Progress in Particleand Nuclear Physics vol 50 no 2 pp 263ndash272 2003
[41] H Hassanabadi ldquoA simple physical approach to study spectrumof baryonsrdquo Communications in Theoretical Physics vol 55 no2 p 303 2011
[42] HHassanabadi A A Rajabi and S Zarrinkamar ldquoSpectrum ofbaryons and spin-isospin dependencerdquo Modern Physics LettersA vol 23 no 7 pp 527ndash537 2008
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
High Energy PhysicsAdvances in
The Scientific World JournalHindawi Publishing Corporation httpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
FluidsJournal of
Atomic and Molecular Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Advances in Condensed Matter Physics
OpticsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstronomyAdvances in
International Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Superconductivity
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Statistical MechanicsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
GravityJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstrophysicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Physics Research International
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Solid State PhysicsJournal of
Computational Methods in Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Soft MatterJournal of
Hindawi Publishing Corporationhttpwwwhindawicom
AerodynamicsJournal of
Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
PhotonicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Journal of
Biophysics
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
ThermodynamicsJournal of
6 ISRN High Energy Physics
[18] R J Furnstahl J J Rusnak and B D Serot ldquoThe nuclear spin-orbit force in chiral effective field theoriesrdquo Nuclear Physics Avol 632 no 4 pp 607ndash623 1998
[19] H Yukawa ldquoOn the interaction of elementary particles IrdquoProceedings of the Physico-Mathematical Society of Japan vol 17pp 48ndash57 1935
[20] H Yukawa ldquoOn the interaction of elementary particles IIrdquoProceedings of the Physico-Mathematical Society of Japan vol 19pp 1084ndash1093 1937
[21] S Zarrinkamar A A Rajabi and H Hassanabadi ldquoDiracequation for the harmonic scalar and vector potentials andlinear plus Coulomb-like tensor potential the SUSY approachrdquoAnnals of Physics vol 325 no 11 pp 2522ndash2528 2010
[22] H Hassanabadi E Maghsoodi S Zarrinkamar and H Rahi-mov ldquoDirac equation for generalized Poschl-Teller scalarand vector potentials and a Coulomb tensor interaction byNikiforov-Uvarov methodrdquo Journal of Mathematical Physicsvol 53 no 2 Article ID 022104 2012
[23] M Moshinsky and A Szczepaniak ldquoThe Dirac oscillatorrdquoJournal of Physics A vol 22 no 17 pp L817ndashL819 1989
[24] H Bahlouli M S Abdelmonem and I M Nasser ldquoAnalyticaltreatment of the Yukawa potentialrdquo Physica Scripta vol 82Article ID 065005 2010
[25] M R Shojaei and A A Rajabi ldquoHypercentral constituent quarkmodel and the hyperfine dependence potentialrdquo Iranian Journalof Physics Research vol 7 no 2 2007
[26] A A Rajabi ldquoA three-body force model for the harmonic andanharmonic oscillatorrdquo Iranian Journal of Physics Research vol5 no 2 2005
[27] N Salehi and A A Rajabi ldquoProton static properties by usinghypercentral constituent quark model and isospinrdquo ModernPhysics Letters A vol 24 no 32 pp 2631ndash2637 2009
[28] A D Alhaidari H Bahlouli and A Al-Hasan ldquoDirac andKlein-Gordon equations with equal scalar and vector poten-tialsrdquo Physics Letters A vol 349 no 1ndash4 pp 87ndash97 2006
[29] A A Rajabi ldquoHypercentral constituent quark model andisospin for the baryon static propertiesrdquo Journal of SciencesIslamic Republic of Iran vol 16 pp 73ndash79 2005
[30] N Salehi and A A Rajabi ldquoA new method for obtaining thespectrum of baryon resonances in the Killingbeck potentialrdquoPhysica Scripta vol 85 Article ID 055101 2012
[31] C-Y Chen ldquoExact solutions of the Dirac equation with scalarand vector Hartmann potentialsrdquo Physics Letters A vol 339 no3-5 pp 283ndash287 2005
[32] A A Rajabi ldquoA method to solve the Schrodinger equationfor any power hypercentral potentialsrdquo Communications inTheoretical Physics vol 48 no 1 pp 151ndash158 2007
[33] N Salehi A A Rajabi and Z Ghalenovi ldquoSpectrum of strangeand nonstrange baryons by using generalized gursey radicatimass formula and hypercentral potentialrdquoActa Physica PolonicaB vol 42 no 6 pp 1247ndash1259 2011
[34] S S M Wong ldquoIntroductory Nuclear Physicsrdquo John Wiley ampSons 1998
[35] N Salehi A A Rajabi and Z Ghalenovi ldquoCalculation ofnonstrange baryon spectra based on symmetry group theoryand the hypercentral potentialrdquo Chinese Journal of Physics vol50 no 1 p 28 2012
[36] L Y Glozman W Plessas K Varga and R F WagenbrunnldquoUnified description of light- and strange-baryon spectrardquoPhysical Review D vol 58 no 9 Article ID 094030 1998
[37] M De Sanctis M M Giannini E Santopinto and A VassalloldquoElectromagnetic form factors in the hypercentral CQMrdquo Euro-pean Physical Journal A vol 19 no 1 pp 81ndash85 2004
[38] L Y Glozman and D O Riska ldquoThe spectrum of the nucleonsand the strange hyperons and chiral dynamicsrdquo Physics Reportvol 268 no 4 pp 263ndash303 1996
[39] M F de la Ripelle ldquoA confining potential for quarksrdquo NuclearPhysics A vol 497 pp 595ndash602 1989
[40] MM Giannini E Santopinto and A Vassallo ldquoAn overview ofthe hypercentral Constituent QuarkModelrdquo Progress in Particleand Nuclear Physics vol 50 no 2 pp 263ndash272 2003
[41] H Hassanabadi ldquoA simple physical approach to study spectrumof baryonsrdquo Communications in Theoretical Physics vol 55 no2 p 303 2011
[42] HHassanabadi A A Rajabi and S Zarrinkamar ldquoSpectrum ofbaryons and spin-isospin dependencerdquo Modern Physics LettersA vol 23 no 7 pp 527ndash537 2008
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
High Energy PhysicsAdvances in
The Scientific World JournalHindawi Publishing Corporation httpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
FluidsJournal of
Atomic and Molecular Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Advances in Condensed Matter Physics
OpticsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstronomyAdvances in
International Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Superconductivity
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Statistical MechanicsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
GravityJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstrophysicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Physics Research International
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Solid State PhysicsJournal of
Computational Methods in Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Soft MatterJournal of
Hindawi Publishing Corporationhttpwwwhindawicom
AerodynamicsJournal of
Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
PhotonicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Journal of
Biophysics
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
ThermodynamicsJournal of
Submit your manuscripts athttpwwwhindawicom
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
High Energy PhysicsAdvances in
The Scientific World JournalHindawi Publishing Corporation httpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
FluidsJournal of
Atomic and Molecular Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Advances in Condensed Matter Physics
OpticsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstronomyAdvances in
International Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Superconductivity
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Statistical MechanicsInternational Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
GravityJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
AstrophysicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Physics Research International
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Solid State PhysicsJournal of
Computational Methods in Physics
Journal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Soft MatterJournal of
Hindawi Publishing Corporationhttpwwwhindawicom
AerodynamicsJournal of
Volume 2014
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
PhotonicsJournal of
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
Journal of
Biophysics
Hindawi Publishing Corporationhttpwwwhindawicom Volume 2014
ThermodynamicsJournal of