neutrino physics – theory and...
TRANSCRIPT
![Page 1: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/1.jpg)
Neutrino Physics – Theory and Phenomenology
11th ICFA Seminar Beijing, P.R. China 2014
Eligio Lisi INFN, Bari, Italy
Sinaru[m] Situs (Chinese Land)
Catay (Northern China)
Serica (Land of Silk)
Mangi (Southern China) *
* We are here
![Page 2: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/2.jpg)
[Royal Library, Windsor Collection. Executed by one of Leonardo’s workshop assistants.]
Prologue: 500 years ago (A.D. ~ 1514)
A remarkable world map by Leonardo da Vinci...
* We are here
2
Northern hemisphere Southern hemisphere
![Page 3: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/3.jpg)
... made with octant projections
3
Earliest known world map ...
A XX century octant map
![Page 4: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/4.jpg)
... made with octant projections
... showing the name “America”
4
Earliest known world map ...
![Page 5: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/5.jpg)
... made with octant projections
... showing the name “America”
... with America’s west coast disconnected from Asia
5
Earliest known world map ...
![Page 6: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/6.jpg)
Earliest known world map ...
... made with octant projections
... showing the name “America”
... with America’s west coast disconnected from Asia
... indicating a large Southern continent
6
![Page 7: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/7.jpg)
But, A.D. 1514 too early to...
... avoid strong mapping distortions and biases
7
a b c d
a b
d c
![Page 8: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/8.jpg)
... avoid strong mapping distortions and biases
... know about Australian continent (~ 90 years later)
?
8
But, A.D. 1514 too early to...
![Page 9: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/9.jpg)
... avoid strong mapping distortions and biases
... know about Australian continent (~ 90 years later)
... know about a larger world picture (~ 30 years later)
9
But, A.D. 1514 too early to...
1543 Copernicus
![Page 10: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/10.jpg)
...we are in a similar situation in neutrino (and particle) physics: - being excited by recent discoveries - mapping (quasi)known lands (with biases?) - planning expeditions to unknown lands - trying to find a larger “world picture” Theory may give some guidance in this (probably) long and difficult enterprise, largely driven by new experiments.
10
500 years later...
![Page 11: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/11.jpg)
TALK OUTLINE: - being excited by recent discoveries - mapping (quasi)known lands (with biases?) - planning expeditions to unknown lands - trying to find a larger “world picture” ...charting the neutrino world...
11
![Page 12: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/12.jpg)
Recent discoveries: α à β oscillations in vacuum and matter
a
b
c
d
e
f
g
eàe ( δm2 , θ12 )
eàe ( δm2 , θ12 )
µàµ ( Δm2 , θ23 )
µàµ ( Δm2 , θ23 )
eàe ( Δm2 , θ13 )
µàe ( Δm2 , θ13 , θ23 )
µàτ ( Δm2 , θ23 ) Data from various types of neutrino experiments: (a) solar, (b) long-baseline reactor, (c) atmospheric, (d) long-baseline accelerator, (e) short-baseline reactor, (f,g) long baseline accelerator (and, in part, atmospheric). (a) KamLAND [plot]; (b) Borexino [plot], Homestake, Super-K, SAGE, GALLEX/GNO, SNO; (c) Super-K atmosph. [plot], MACRO, MINOS etc.; (d) T2K (plot), MINOS, K2K; (e) Daya Bay [plot], RENO, Double Chooz; (f) T2K [plot], MINOS; (g) OPERA [plot], Super-K atmospheric.
See next talks by Jung, Shiozawa, Cao
![Page 13: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/13.jpg)
Can be charted in a simple 3ν theoretical framework
a
b
c
d
e
f
g
eàe ( δm2 , θ12 )
eàe ( δm2 , θ12 )
µàµ ( Δm2 , θ23 )
µàµ ( Δm2 , θ23 )
eàe ( Δm2 , θ13 )
µàe ( Δm2 , θ13 , θ23 )
µàτ ( Δm2 , θ23 )
δm2 |Δm2|
θ12 θ23 θ13
Terra cognita:
![Page 14: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/14.jpg)
U↵i =
2
41 0 00 c23 s230 �s23 c23
3
5
2
4c13 0 s13e�i�
0 1 0�s13ei� 0 c13
3
5
2
4c12 s12 0�s12 c12 00 0 1
3
5
2
41 0 00 ei↵/2 00 0 ei�/2
3
5
Pontecorvo-Maki-Nakagawa-Sakata (PMNS) matrix
[ only if Majorana ]
Mass-squared spectrum (up to absolute scale)
Mixing angles θ23, θ13, θ12 : known ✔ CP-violat. phase(s) δ (α, β) : unknown ✗
1 2
1 2
δm2
δm2 Δm2
Δm2 “Normal” Hierarchy
“Inverted” Hierarchy
δm2, Δm2: known ✔ Matter effects (solar ν): ✔ Hierarchy : unknown ✗
[ + contribution in matter ~ GF . E . density ]
14
![Page 15: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/15.jpg)
15
Current 3ν picture in just one slide (with 1-digit accuracy) Flavors = e µ τ
+Δm2
δm2 m2ν ν2
ν1
ν3
ν3
-Δm2
Abs.scale Normal hierarchy… or… Inverted hierarchy mass2 split
δm2 ~ 8 x 10-5 eV2
Δm2 ~ 2 x 10-3 eV2
sin2θ12 ~ 0.3 sin2θ23 ~ 0.5 sin2θ13 ~ 0.02
δ (CP) sign(Δm2) octant(θ23) absolute mass scale Dirac/Majorana nature
Terra Cognita: Terra Incognita:
![Page 16: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/16.jpg)
16
Old but still strong theoretical argument for Majorana ν’s as messengers of new physics scale (see-saw + Weinberg):
Old but still unique experimental probe of Maiorana ν’s nature via ΔL=2 process: neutrinoless double beta decay. See next talk by Schoenert
Rare effects from high energies
• Effects of high-energy physics as effective operators added to the standard model
• can be classified systematically
17 13
L = LSM +1
⇤L5 +
1
⇤2L6 + · · ·
L5 = (LH)(LH) ! 1
⇤(LhHi)(LhHi) = m⌫⌫⌫
L6 = QQQL, L�µ⌫Wµ⌫Hl, ✏abcWaµ⌫ W b⌫
� W c�µ ,
(H†DµH)(H†DµH), Bµ⌫H†Wµ⌫H, · · ·
(H. Murayama at ICFA Seminar 2011, CERN)
![Page 17: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/17.jpg)
Charting 3ν param. with more digits: global analysis à
Analysis includes increasingly rich oscill. data sets:
LBL Acc + Solar + KL LBL Acc + Solar + KL + SBL Reactor LBL Acc + Solar + KL + SBL Reactor + SK Atm.
Parameters not shown are marginalized away.
C.L.’s are drawn at Δχ2 = 1, 4, 9 à Nσ = 1, 2, 3 for projections over single parameters.
17
Figures from Capozzi et al., arXiv:1312.2878 (+ Neutrino 2014 updates) See also: Gonzalez-Garcia et al., 1409.5439; Forero et al., 1405.7540.
![Page 18: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/18.jpg)
18
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors + SK AtmmN
mNNHIH
Current accuracy in mapping
Terra Cognita:
δm2 2.6 % Δm2 2.6 % sin2θ12 5.4 % sin2θ13 8.5 % sin2θ23 ~ 10 % *
* *
(but... in which octant?)
θ23
π/4
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors + SK Atm
mNmN
NHIH
![Page 19: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/19.jpg)
19
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors
mNmN
NHIH
δCP
LBL+Sol+KL +SBL Reac +SK atm
intriguing, sin δ ~ -1 (or sin δ < 0) favored
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL
mNmN
NHIH
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors
mNmN
NHIH
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors + SK Atm
mNmN
NHIH
Terra Incognita I (oscill. param.): current hints
θ23
Δχ2 (IH-NH)
octant
-1.4 -0.9 -0.1
unstable, fragile
negligible 12e2sin
0.25 0.30 0.350
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL
mNmN
NHIH
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors
mNmN
NHIH
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors
mNmN
NHIH
12e2sin0.25 0.30 0.35
0
1
2
3
4
23e2sin0.3 0.4 0.5 0.6 0.7
13e2sin0.01 0.02 0.03 0.04
2 eV -5/102mb6.5 7.0 7.5 8.0 8.50
1
2
3
4
2 eV -3/102m62.0 2.2 2.4 2.6 2.8
//b0.0 0.5 1.0 1.5 2.0
LBL Acc + Solar + KL + SBL Reactors + SK Atm
mNmN
NHIH
![Page 20: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/20.jpg)
Oscillation searches can probe the hierarchy...
δm2
δm2
+Δm2 -Δm2
... if one can observe interference of oscill. driven by ±Δm2 with oscill. driven by another quantity Q with known sign. 3 options:
Q = δm2 (medium-baseline reactors)
Q = 2√ 2 GF Ne E (matter effects in accel./atmosph. ν)
Q = 2√ 2 GF Nν E (collective effects in SNe)
(IH) (NH)
20
All paths to the hierarchy are being actively investigated from the experimental - theoretical - phenomenological viewpoint.
![Page 21: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/21.jpg)
21
The path towards a possible discovery of leptonic CP violation requires 6 steps:
3 mixing angles should be nonvanishing ✔
2 mass gaps should be nonvanishing ✔
1 Dirac phase should be nonvanishing ...
Nature has already allowed us 5 steps in favorable conditions, i.e., at accessible terrestrial scales ...
Current hints suggest that the 6th may be at reach...
...expeditions to neutrino CPV-land are a must!
[and, if neutrinos are Majorana... CPV bonanza with 2 more phases ! ]
![Page 22: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/22.jpg)
22
Let us hope that history may repeat itself, as for a previous lucky hint...
so that we may discuss about “nearly maximal leptonic CP violation” at ICFA seminar 20XX!
Andre de Gouvea Northwestern
Hint for Non-Zero ✓13
in the Current Data?
G.L. Fogli et al, arXiv:0806.2649 [hep-ph]
October 28, 2008 ⌫ Overview
Andre de Gouvea Northwestern
Hint for Non-Zero ✓13
in the Current Data?
G.L. Fogli et al, arXiv:0806.2649 [hep-ph]
October 28, 2008 ⌫ Overview
(A. de Gouvea at ICFA Seminar 2008, SLAC)
![Page 23: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/23.jpg)
23
(mβ, mββ, Σ)
β decay, sensitive to the “effective electron neutrino mass”:
0νββ decay: only if Majorana. “Effective Majorana mass”:
Cosmology: Dominantly sensitive to sum of neutrino masses:
In the 3ν framework:
Note 1: These observables may provide handles to distinguish NH/IH. Note 2: Majorana case gives a new source of CPV (unconstrained) Note 2: The three observables are correlated by oscillation dataà
Terra Incognita II (absolute mass observables)
![Page 24: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/24.jpg)
24
-1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
-110 1-310
-210
-110
1
-3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
10
20
30
40
50
60
70
80
90
100
-310 -210 -110 1-310
-210
-110
1-1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4
-2.0
-1.5
-1.0
-0.5
0.0
-110 1-310
-210
-110
1
(NH)m2 (IH)m2
(eV)Y (eV)`m
(eV)
``m
(eV)
`m
β : Mainz+Troitsk
Σ : CMB+LSS 0νββ : GERDA, EXO, KL-Zen, ...
oscillation constraints
Upper limits on mβ, mββ, Σ (up to some syst.) + osc. constraints
mββ spread due to
Majorana CP phase(s):
accessible in principle
[Clearly, the inverted hierarchy case would make life easier...]
![Page 25: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/25.jpg)
25
-1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
-110 1-310
-210
-110
1
-3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
10
20
30
40
50
60
70
80
90
100
-310 -210 -110 1-310
-210
-110
1-1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4
-2.0
-1.5
-1.0
-0.5
0.0
-110 1-310
-210
-110
1
(NH)m2 (IH)m2
(eV)Y (eV)`m
(eV)
``m
(eV)
`m
β : KATRIN
Σ : Precision Cosmology 0νββ : Upgraded/New expt. (+ NME)
oscillation constraints
Upper limits on mβ, mββ, Σ in ~10 years ?
Large phase space for discoveries about ν mass and nature.
![Page 26: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/26.jpg)
26
Theory can help in both “mapping” and “discovery” expeditions Two examples of well-defined, long-term theory programs:
Reconstructed neutrino energy in the CCQE channel
? Neutrino energyreconstructed using 2 ⇥104
pairs of (|p|,E) valuessampled from realistic (SF)and FG oxygen spectralfunctions
? The average value hE⌫iobtained from the realisticspectral function turns out tobe shifted towards largerenergy by ⇠ 70 MeV
Omar Benhar (INFN and “Sapienza”, Roma) NOW 2014 September 10, 2014 6 / 21
CCQE
Must improve modeling of ν-nucleus cross sections, to understand energy spectra in accelerator and atmospheric searches for CPV and mass hierarchy
Must improve modeling of nuclear structure, to understand and compare signals or limits on 0νββ decay rates and related weak/strong processes
Require joint effort from nuclear and particle phys. communities
Sim
kovic
at NO
W 2
01
4
Be
nh
ar at N
OW
20
14
![Page 27: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/27.jpg)
27
Sooner or later (say, 10±10 years ?), another galactic SN should explode... Its “autopsy” will keep us busy for decades, and teach us a lot about astrophysics and neutrino physics.
Simulations of SN explosions, (anti)nu fluences and flavor transitions, which are already very demanding, will need to reach complexity levels comparable -probably- to QCD lattice calculations.
Will spark a truly interdisciplinary program from diverse communities
Ra
ffelt at N
OW
20
14
SN 1054
Another long-term theory program for an “unpredictable” event:
see also next talk by Halzen
![Page 28: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/28.jpg)
ν1
ν2
ν3
ν3
ν1
ν2 �
�
� �
�
�
Neutrino flavor theory: is the current picture suggestive of some “simmetry”? Or the symmetry is only in our mind, and there is just randomness?
Are there possible connections with the quark flavor sector?
θ12
θ23 θ13
28
Many interesting ideas, but no obvious answer/guidance so far
![Page 29: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/29.jpg)
29
Specific outcomes (a few examples from a vast literature)
No organizing principle (“anarchy”)
Discrete family simmetries (“geometry”)
Continuous flavor simmetries (“dynamics”)
Common quark/lepton features (“complementarity”)
linear relations between θ13cosδ and θ12, θ23
links between neutrino spectra/angles/phases
links between θ13 and θC
Model selection will benefit from higher precision
![Page 30: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/30.jpg)
We should not be biased by the success of the 3ν scheme... If we sail too close to the 3ν coastline ... we might miss an entire new continent (new neutrino states and interactions)
?
30
Beyond the 3ν paradigm
![Page 31: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/31.jpg)
MiniBoone LSND
νs ? !
In recent years, further interest in light sterile ν raised by:
1) Possible associated νeàνe disappearance signals 2) Possible associated extra radiation in cosmology
31
Light states: conflicting sightings of νS with (sub)eV mass from various sailors in the last 20 years... new land or mirage?
The question raised by the LSND claim is still with us: Is there νµàνe appearance at a scale √ΔM2~O(0.1-1) eV ?
Available data: intriguing, but not conclusive or convergent.
![Page 32: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/32.jpg)
32
3+1 Global Fit[Preliminary 2014 Update]
sin22ϑeµ
Δm
412
[eV2 ]
10−4 10−3 10−2 10−1 110−1
1
10
+
10−4 10−3 10−2 10−1 110−1
1
10
+
3+1 − GLO68.27% CL90.00% CL95.45% CL99.00% CL99.73% CL
3+1 − 3σνe DISνµ DISDISAPP
MiniBooNE E > 475MeVGoF = 26% PGoF = 7%
! APP !µ ! !e & !µ ! !e :LSND (Y), MiniBooNE (?),OPERA (N), ICARUS (N),KARMEN (N), NOMAD (N),BNL-E776 (N)
! DIS !e & !e : Reactors (Y),Gallium (Y), !eC (N),Solar (N)
! DIS !µ & !µ: CDHSW (N),MINOS (N),Atmospheric (N),MiniBooNE/SciBooNE (N)
No Osc. excluded at 6.3"!#2/NDF = 47.7/3
[Giunti, Laveder, Y.F. Li, H.W. Long, PRD 88 (2013) 073008][di!erent approach and conclusions: Kopp, Machado, Maltoni, Schwetz, JHEP 1305 (2013) 050]
C. Giunti ! Phenomenology of Light Sterile Neutrinos ! Corfu 2014 ! 6 September 2014 ! 24
From Giunti et al. 2014. Note: Kopp et al. 2014 find worse GOF.
In general, tension between appearance and disappearance oscillations. Also: some tension between oscillation and cosmology (not included above)
![Page 33: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/33.jpg)
33
eV
sub-eV
per mill mixing
Need a “redundant” oscillation search, exploring a wide mass-mixing range, and cross-checking both appearance and disappearance, in order to discover (or rule out) conclusively light sterile neutrino states.
![Page 34: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/34.jpg)
34
Nonstandard interactions/processes in neutrino physics: no sightings so far, but they should always be kept in mind; examples in 0νββ decay:
u e e u
W W ν
Standard
u e e u
W W N
Heavy ν
u e e u
Kaluza-Klein (KK±1 Brane:a=10±1/GeV)
W W ν(n)
u e e u
WR,L
νL,R RHC λ,η λ=RH had, η=LH had
WR,L
e u u e
u u g
SUSY g
~ ~ ~
~
p e e p
π
SUSY π
π SUSY
![Page 35: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/35.jpg)
35
Towards a larger picture and higher scales
1543 Copernicus 1514 Leonardo
![Page 36: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/36.jpg)
Linking two fundamental research expeditions:
1. Test Higgs sector
2. Find ν masses
36
![Page 37: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/37.jpg)
ν ?
cou
pling to Higgs à
1 + 2 Where are the ν’s on this plot? Why are they so light?
par@cle mass à < 1 eV 37
![Page 38: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/38.jpg)
ν
Dirac: neutrinos “talk” very weakly to the Higgs boson, y < 10-‐12 for unknown reasons...
< 1 eV
�
Options:
par@cle mass à
cou
pling to Higgs à
38
![Page 39: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/39.jpg)
ν
Majorana: neutrinos talk “normally” to the Higgs, but also to other (much) higher scale(s) M -‐-‐> suppression yMH/M
< 1 eV
�
Options:
� � �
par@cle mass à
cou
pling to Higgs à
39
![Page 40: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/40.jpg)
MH
m(ν)
M Neutrinos masses may offer a great opportunity to jump beyond the EW framework via see-saw ...
... and to address fundamental physics issues, such as: � new sources of CP violation at low and high energies � lepton number violation and associated phenomena � matter-antimatter asymmetry of the universe ...
40
� � � �
![Page 41: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/41.jpg)
M ~ GUT scale
41
� � � �
CP-violating decays of heavy neutrinos at scale M may generate lepton asymmetry (leptogenesis): Discovery of leptonic CP violation and of Majorana nature (+ proton decay?) would be important steps towards this scenario.
![Page 42: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/42.jpg)
M ~ low scale
42
� � � �
CP-violating decays of heavy neutrinos at scale M may generate lepton asymmetry (leptogenesis). Discovery of leptonic CP violation and of Majorana nature (+ proton decay?) would be important steps towards this scenario.
At the other end of the spectrum, low-scale (e.g. EW) see-saw may also generate (at the price of fine-tuning) additional interesting phenomenology: dark matter candidates, di-lepton and heavy lepton events in HEP
![Page 43: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/43.jpg)
43
� � � �
CP-violating decays of heavy neutrinos at scale M may generate lepton asymmetry (leptogenesis). Discovery of leptonic CP violation and of Majorana nature (+ proton decay?) would be important steps towards this scenario.
At the other end of the spectrum, low-scale (e.g. EW) see-saw may also generate (at the price of fine-tuning) additional interesting phenomenology: dark matter candidates, di-lepton and heavy lepton events in HEP
In principle, several sterile states might even be split among widely difference energy scales, and contribute to various phenomena in (astro)particle physics. Let us remain open-minded!
![Page 44: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/44.jpg)
44
EPILOGUE
![Page 45: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/45.jpg)
45
δm2 ~ 8x10-5 eV2
Δm2 ~ 2x10-3 eV2
sin2θ12 ~ 0.3 sin2θ23 ~ 0.5 sin2θ13 ~ 0.02
Terra Cognita...
EPILOGUE
![Page 46: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/46.jpg)
46
δm2 ~ 8x10-5 eV2
Δm2 ~ 2x10-3 eV2
sin2θ12 ~ 0.3 sin2θ23 ~ 0.5 sin2θ13 ~ 0.02
δ (CP) sign(Δm2) octant(θ23) absolute masses Dirac/Majorana
Terra Cognita... Terra Incognita...
EPILOGUE
![Page 47: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/47.jpg)
47
δm2 ~ 8x10-5 eV2
Δm2 ~ 2x10-3 eV2
sin2θ12 ~ 0.3 sin2θ23 ~ 0.5 sin2θ13 ~ 0.02
δ (CP) sign(Δm2) octant(θ23) absolute masses Dirac/Majorana
Terra Cognita... Terra Incognita... new light states
new heavy states nonstandard inter. flavor structure baryon asymmetry
....and beyond...
EPILOGUE
![Page 48: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/48.jpg)
48
EPILOGUE Further theoretical and experimental explorations will
require significant time, resources and ... good fortune! So, for neutrino physics, let us wish...
![Page 49: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/49.jpg)
49
EPILOGUE Further theoretical and experimental explorations will
require significant time, resources and ... good fortune! So, for neutrino physics, let us wish...
![Page 50: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/50.jpg)
50
Additional slides
![Page 51: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/51.jpg)
(θ13, δ) covariance plot
Current CP hint apparently stable for increasingly rich data sets. In combination, δ/π ∼ 1.4 and sinδ < 0 favored in both hierarchies.
51
0.01 0.02 0.03 0.04 0.05 0.060.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00 0.01 0.02 0.03 0.04 0.05 0.060.0
0.5
1.0
1.5
2.0
0.01 0.02 0.03 0.04 0.05 0.060.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00 0.01 0.02 0.03 0.04 0.05 0.060.0
0.5
1.0
1.5
2.0
0.01 0.02 0.03 0.04 0.05 0.060.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00 0.01 0.02 0.03 0.04 0.05 0.060.0
0.5
1.0
1.5
2.00.01 0.02 0.03 0.04 0.05 0.060.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00 0.01 0.02 0.03 0.04 0.05 0.060.0
0.5
1.0
1.5
2.0
0.01 0.02 0.03 0.04 0.05 0.060.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00 0.01 0.02 0.03 0.04 0.05 0.060.0
0.5
1.0
1.5
2.0
0.01 0.02 0.03 0.04 0.05 0.060.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00 0.01 0.02 0.03 0.04 0.05 0.060.0
0.5
1.0
1.5
2.0LBL Acc + Solar + KL + SBL Reactors + SK Atm
13e2sin 13e2sin 13e2sin
13e2sin 13e2sin 13e2sin
//b//b
m1 m2 m3
Norm
al Hierarchy
Inverted Hierarchy
![Page 52: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/52.jpg)
52
0.2 0.3 0.4 0.5 0.6 0.7 0.8
0.01
0.02
0.03
0.04
0.05
0.06
0.3 0.4 0.5 0.6 0.70.00
0.01
0.02
0.03
0.04
0.05
0.06
0.2 0.3 0.4 0.5 0.6 0.7 0.8
0.01
0.02
0.03
0.04
0.05
0.06
0.3 0.4 0.5 0.6 0.70.00
0.01
0.02
0.03
0.04
0.05
0.06
0.2 0.3 0.4 0.5 0.6 0.7 0.8
0.01
0.02
0.03
0.04
0.05
0.06
0.3 0.4 0.5 0.6 0.70.00
0.01
0.02
0.03
0.04
0.05
0.060.2 0.3 0.4 0.5 0.6 0.7 0.8
0.01
0.02
0.03
0.04
0.05
0.06
0.3 0.4 0.5 0.6 0.70.00
0.01
0.02
0.03
0.04
0.05
0.06
0.2 0.3 0.4 0.5 0.6 0.7 0.8
0.01
0.02
0.03
0.04
0.05
0.06
0.3 0.4 0.5 0.6 0.70.00
0.01
0.02
0.03
0.04
0.05
0.06
0.2 0.3 0.4 0.5 0.6 0.7 0.8
0.01
0.02
0.03
0.04
0.05
0.06
0.3 0.4 0.5 0.6 0.70.00
0.01
0.02
0.03
0.04
0.05
0.06LBL Acc + Solar + KL + SBL Reactors + SK Atm
23e2sin 23e2sin 23e2sin
23e2sin 23e2sin 23e2sin
13e2si
n13e2
sin
m1 m2 m3
Norm
al Hierarchy
Inverted Hierarchy
![Page 53: Neutrino Physics – Theory and Phenomenologyindico.ihep.ac.cn/event/3867/session/3/contribution/8/material/slides/0.pdf · Neutrino Physics – Theory and Phenomenology 11th ICFA](https://reader030.vdocument.in/reader030/viewer/2022040123/5e1c8d26455fe95913795a26/html5/thumbnails/53.jpg)
53
0.2 0.3 0.4 0.5 0.6 0.7 0.82.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
0.3 0.4 0.5 0.6 0.72.0
2.2
2.4
2.6
2.8
0.2 0.3 0.4 0.5 0.6 0.7 0.82.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
0.3 0.4 0.5 0.6 0.72.0
2.2
2.4
2.6
2.8
0.2 0.3 0.4 0.5 0.6 0.7 0.82.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
0.3 0.4 0.5 0.6 0.72.0
2.2
2.4
2.6
2.80.2 0.3 0.4 0.5 0.6 0.7 0.82.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
0.3 0.4 0.5 0.6 0.72.0
2.2
2.4
2.6
2.8
0.2 0.3 0.4 0.5 0.6 0.7 0.82.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
0.3 0.4 0.5 0.6 0.72.0
2.2
2.4
2.6
2.8
0.2 0.3 0.4 0.5 0.6 0.7 0.82.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
0.3 0.4 0.5 0.6 0.72.0
2.2
2.4
2.6
2.8LBL Acc + Solar + KL + SBL Reactors + SK Atm
23e2sin 23e2sin 23e2sin
23e2sin 23e2sin 23e2sin
2 e
V 3
10
× 2 m
62
eV
3 1
0× 2
m6
m1 m2 m3
Norm
al Hierarchy
Inverted Hierarchy