コライダー、ニュートリノ、750 GeV 東京大学 理学系研究科 素粒子論研究室 高江洲 義太郎 たかえす よしたろう
750 GeV
4
CP 750 GeV excess
c = = 1
[GeV]109 eV
LHC ( CERN (
7.5 TeV 2 = 13 TeV
eV1012
pp
p
p
Simulation is an important tool
Theory ExperimentSimulation
LHC pp
LHC pp
Event generator (parton level) MadGraph
gluon
103
104
105
106
107
2 3 4 5 6
Tim
e (s
ec)
Final Gluons (n)
gg -> ng Timing
LC chMG5 LC
SherpaLC ch parallel
MG5 LC parallel
100,000 events with 1 core CPU / ~ 100 core cluster (KEKCC)
KIAS)
CP
CP
CP
Normal Hierarchy (NH)
Inverted Hierarchy (IH)
(i = 1, 2, 3)
T2K/T2HK&
DUNE%
Nova%
PINGU&
INO
RENO50
ESSnuS
T2K (LBL, 22.5kt WC) (2011 ~ ) Nova (LBL, 14kt LAr) (2014 ~ )
INO (atm, 50kt Iron) (2018 ~ ) JUNO (react, 20kt LSci) (2020 ~ )
RENO50 (react, 18kt LSci) (2022 ~ ) ORCA (atm, 3Mt Ocean) (2020 ~ ) PINGU (atm, 3Mt Ice) (2021 ~ ) DUNE (LBL, 40kt LAr) (2024 ~ ) T2HK (LBL, 560kt WC) (2025 ~ ) ESSnuSB (LBL, 500kt WC) (2030 ~ )
T2K/T2HK&
DUNE%
Nova%
PINGU&
INO
RENO50
ESSnuS
T2K (LBL, 22.5kt WC) (2011 ~ ) Nova (LBL, 14kt LAr) (2014 ~ )
INO (atm, 50kt Iron) (2018 ~ ) JUNO (react, 20kt LSci) (2020 ~ )
RENO50 (react, 18kt LSci) (2022 ~ ) ORCA (atm, 3Mt Ocean) (2020 ~ ) PINGU (atm, 3Mt Ice) (2021 ~ ) DUNE (LBL, 40kt LAr) (2024 ~ ) T2HK (LBL, 560kt WC) (2025 ~ ) ESSnuSB (LBL, 500kt WC) (2030 ~ )
PMT
Inside Detector
Inverse Beta Decay (IBD)
@ detector
far
Neutrino oscillation
NHIH
18kton 16.5GW 5yrs (RENO-50)
NH
E. Ciuffoli, J. Evslin, X. Zhang: 1302.0624 Y-F. Li, J. Cao, Y. Wang, L. Zhan: 1303.6733
L = L1 L2
L1 L2
() 16.5GW 18kton 5yrs (RENO-50)a = 3%, b = 0.5%
50 km
() 16.5GW 18kton 5yrs (RENO-50)a = 3%, b = 0.5%
50 km
250m
multi-cores
() 16.5GW 18kton 5yrsa = 3%, b = 0.5%
50 km
250m
multi-cores
() 16.5GW 18kton 5yrsa = 3%, b = 0.5%
50 km
250m
multi-cores
() 16.5GW 18kton 5yrsa = 3%, b = 0.5%
50 km
250m
multi-cores
() 16.5GW 18kton 5yrsa = 3%, b = 0.5%
All Reactors50 km
250m
750 GeV
LHC ( CERN (
13 TeV(1TeV = eV) 1012
pp
8TeV ~2012 )
ATLAS, CMS
ATLAS, CMS
p
p
X
} m =(p1 + p2)2> 500 GeV (CMS)> 200 GeV (ATLAS)
p = (E, px, py, pz)
( )
m
ATLAS-CONF-2015-081
m
ATLAS-CONF-2015-081
m
m = 750GeV
ATLAS-CONF-2015-081
EXO-15-004-pas
m = 750GeV
m = 760GeV
ATLAS-CONF-2015-081
EXO-15-004-pas
m = 750GeV
m = 760GeV
3.9(2.3) (45 GeV )
2.6(1.2)
3.6(2.0) ( ){
(
* 5
m
p
p
m 750 GeV
arXiv:1601.03696
O(1) fb
50 GeV? 0 or 2
0 : Le =
1
BB +
2
W iWi +
3
GaGa
B
B
W i
W i
Ga
Ga
11
12
13
1
1Z
1ZZ
Z
Z
Z
* (pseudo-scalar )1
i i
12
W+
W
750 GeV
(m mZ ,mW )
1
=cos2 W1
+sin2 W2
1Z
= 2 sin W cos W 11
+12
1ZZ
=sin2 W1
+cos2 W2
LHC (13TeV) LHC(pp )Br( AB) = LHC(pp )Br( )
Br( AB)Br( )
O(1) fb
Excluded by 8TeV LHC(Z mode)
gg mode
*
: ~750 GeV : 1000 1/fb
gg : 170 fb1
*
gg : 170 fb1
gg mode !
mode
1 : 2 : 3 mode
: ~750 GeV : 1000 1/fb
(LHC) CP 750 GeV excess)