cern, february, 2013 diffraction dissociation at the lhc
DESCRIPTION
CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC. László Jenkovszky, Kiev. Some open questions: 0) Definition of diffraction: rapidity gap vs. P exchange; 1) The ratio between SD, DD and CD? - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/1.jpg)
CERN, February, 2013
DIFFRACTION DISSOCIATION at the
LHC
László Jenkovszky, Kiev
![Page 2: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/2.jpg)
![Page 3: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/3.jpg)
![Page 4: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/4.jpg)
Some open questions:
0) Definition of diffraction: rapidity gap vs. P exchange;
1) The ratio between SD, DD and CD?
2) Integrated cross section require the knowledge of the M- dependence for all M! Low- and high M:
3) Duality in M (FMSR);
4) Structures in t: a dip in t~1 GeV^2,…
5) The background (in s and in M);
6) Exclusive-inclusive relation;
7) From elastic to inelastic diffraction (dis)continuity.
![Page 5: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/5.jpg)
Simple (but approximate) factorization relations
![Page 6: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/6.jpg)
α(0)\C + - 1 P O
1/2 f ω
(and ratios: σ/B,…….).
![Page 7: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/7.jpg)
![Page 8: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/8.jpg)
![Page 9: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/9.jpg)
![Page 10: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/10.jpg)
![Page 11: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/11.jpg)
Low-mass diffraction dissociation at the LHCL. Jenkovszky, O. Kuprash, J. Lamsa, V. Magas, and R,. Orava:
Dual-Regge approach to high-energy, low-mass DD at the LHC,Phys. Rev. D83(2011)0566014; hep-ph/1-11.0664.
L. Jenkovszky, O. Kuprash, J. Lamsa and R. Orava: hep-ph/11063299, Mod. Phys. Letters A. 26(2011) 1-9, August 2011.
![Page 12: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/12.jpg)
TriTriple Regge (Pomeron) limit::
![Page 13: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/13.jpg)
FNAL
![Page 14: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/14.jpg)
Alternative (to the triple Regge) approach: Diffraction dissociation and DIS :
G.A. Jaroszkiewicz and P.V. Landshoff, Phys. Rev. 10 (1974) 170; A. Donnachie, P.V. Landshoff, Nucl. Phys. B 244 (1984) 322.
![Page 15: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/15.jpg)
R. Fiore {\it et al.} EPJ A 15 (2002) 505,hep-ph/0206027;.R. Fiore {\it et al.} Phys. Rev. D 68 (2004) 014004, hep-ph/0308178.
JLAJLAB LHC; γ P; q^2 t
![Page 16: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/16.jpg)
![Page 17: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/17.jpg)
![Page 18: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/18.jpg)
Low-mass diffraction dissociation at the LHCL. Jenkovszky, O. Kuprash, J. Lamsa, V. Magas, and R,. Orava:
Dual-Regge approach to high-energy, low-mass DD at the LHC,Phys. Rev. D83(2011)0566014; hep-ph/1-11.0664.
L. Jenkovszky, O. Kuprash, J. Lamsa and R. Orava: hep-ph/11063299, Mod. Phys. Letters A. 26(2011) 1-9, August 2011.
![Page 19: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/19.jpg)
AtAt the LHC, in the nearly forward direction, Pomeron exchange dominates;
the rest, e.g. f-exchange, being negligible
![Page 20: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/20.jpg)
![Page 21: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/21.jpg)
![Page 22: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/22.jpg)
![Page 23: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/23.jpg)
![Page 24: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/24.jpg)
![Page 25: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/25.jpg)
![Page 26: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/26.jpg)
SD and DD cross sections
![Page 27: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/27.jpg)
“Reggeized (dual) Breit-Wigner” formula:
![Page 28: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/28.jpg)
SDD cross sections vs. energy.
*Normalization to ~14 mb at 7 TeV.
![Page 29: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/29.jpg)
Approximation of background to reference points (t=-0.05)
![Page 30: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/30.jpg)
Approximation of background to reference points (t=-0.5)
![Page 31: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/31.jpg)
B-slopes for SD
B-slope for SD cross section vs. t for different M2 values
![Page 32: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/32.jpg)
Double differential SD cross sections
(left) Double differential SD cross sections as a functions of M2 for different t values,(right) Double differential SD cross sections as a function of t for different M2 values.
![Page 33: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/33.jpg)
Single differential integrated SD cross sections
![Page 34: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/34.jpg)
DDD cross sections vs. energy.
![Page 35: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/35.jpg)
Integrated DD cross sections
(left) Single differential SD cross sections as a functions of t integrated in different M1:M2 regions.(right) Double differential SD cross sections as a function M2 integrated in region [0.0: 1.0] of t. value.
![Page 36: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/36.jpg)
Triple differential DD cross sections
t = - 0.1 t = - 0.2
t = - 0.3
![Page 37: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/37.jpg)
The parameters and results
![Page 38: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/38.jpg)
Open problems:
1. Interpolation in energy: from the Fermilab and ISR to the LHC; (Inclusion of non-leading contributions);3. Deviation from a simple Pomeron pole model and breakdown of Regge-factorization;4. Experimental studies of the exclusive channels (p+π,…) produced from the decay of resonances (N*, Roper?,,,) in the nearly forward direction.5. Turn down of the cross section towards t=o?!
![Page 39: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/39.jpg)
Prospects (future plans): central diffractive meson production
(double Pomeron exchange)
![Page 40: CERN, February, 2013 DIFFRACTION DISSOCIATION at the LHC](https://reader033.vdocument.in/reader033/viewer/2022051621/56814d48550346895dba6f09/html5/thumbnails/40.jpg)
Thanks for your attention!
Recent: L. Jenkovszky, R. Orava, A. Salii, Low-mass single- and double diffraction dissociation at the LHC, hep-ph, November.