Download to read offline
![Near
Detectors
measurements
28
Day
[events/1e14POT]
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Event rate
Horn250kA
Horn205kA
Horn-250kA
[mrad]
1−
0.5−
0
0.5
Horizontal beam direction INGRID
MUMON
Day
[mrad]
1−
0.5−
0
0.5
1
Vertical beam direction INGRID
MUMON
T2K Run1
Jan.2010-Jun.2010
T2K Run2
Nov.2010-Mar.2011
T2K Run3
Mar.2012-Jun.2012
T2K Run4
Oct.2012-May.2013
T2K Run5
May.2014
-Jun.2014
T2K Run6
Oct.2014-June.2015
T2K Run7
Feb.2016-May.2016
2/17/17 KEK-‐PH2017
Measured
data
Off-‐axis
neutrino
energy
strongly
depend
on
beam
direction
(1mrad ~ 2% shift of peak energy)
T2K controlled off-axis better than
1mrad
Position from Designed beam center[cm]
400− 200− 0 200 400
Numberofevents
0
10
20
30
40
50
60
70
80
3
10×
/ ndf2χ 10.8 / 4
Constant 161.1±7.168e+04
Mean 1.099±2.428−
Sigma 1.795±437.6
/ ndf2χ 10.8 / 4
Constant 161.1±7.168e+04
Mean 1.099±2.428−
Sigma 1.795±437.6
Position from Designed beam center[cm]
400− 200− 0 200 400Numberofevents 0
10
20
30
40
50
60
70
80
3
10×
/ ndf2χ 39.29 / 4
Constant 163.3±7.392e+04
Mean 1.158±4.593
Sigma 1.979±456
/ ndf2χ 39.29 / 4
Constant 163.3±7.392e+04
Mean 1.158±4.593
Sigma 1.979±456
Data for each module
Fitted Gaussian
Horizontal Vertical](https://image.slidesharecdn.com/ezmyyjktt5meosnnqywe-signature-c6bd610224887eb0e15819666bbfff7379f4eee2caf56ca99545f0489981abb4-poli-170217062740/85/KEK-PH-2017-28-320.jpg)
![2/17/17 KEK-‐PH2017
² Oscillation
dip
is
clearly
observed
² Four
physics
parameters
are
fitted:
and
Results:
𝜈* disappearance
0 1 2 3 4 5 6 7 8
Events/100MeV
0
10
20
30
40
50
60
70
80
90
Prediction
Unoscillated
Best-Fit
Data
Reconstructed Energy [GeV]
0 1 2 3 4 5 6 7 8
Ratio
0
0.5
1
1.5
2
2.5
T2K Run1−7c preliminary
0 1 2 3 4 5 6 7 8
Events/100MeV
0
5
10
15
20
25 Prediction
Unoscillated
Best-Fit
Data
Reconstructed Energy [GeV]
0 1 2 3 4 5 6 7 8
Ratio
0
0.5
1
1.5
2
2.5
T2K Run1−7c preliminary
Neutrino Anti-‐neutrino
Beam
mode Unoscillated pred. Data
Neutrino 521.8 135
Anti-‐neutrino 184.8 66
sin2
✓23, | m2
32| sin2
✓23, | m2
32|
sin2
2✓23
/ | m2
32|
sin2
✓23
/ | m2
32|](https://image.slidesharecdn.com/ezmyyjktt5meosnnqywe-signature-c6bd610224887eb0e15819666bbfff7379f4eee2caf56ca99545f0489981abb4-poli-170217062740/85/KEK-PH-2017-34-320.jpg)
![Oscillation
parameters
extracted
from
T2K
data
2/17/17 KEK-‐PH2017 40
0 1 2 3 4 5 6 7 8
Events
0
10
20
30
40
50
60
70
80
90
Prediction
Unoscillated
Best-Fit
Data
Reconstructed Energy [GeV]
0 1 2 3 4 5 6 7 8
Ratio
0
1
2
3
4
T2K Run1−7c preliminary
0 200 400 600 800 1000 1200 1400
Events
0
0.5
1
1.5
2
2.5
3
3.5
Prediction
Unoscillated
Best-Fit
Data
Reconstructed Momentum [MeV/c]
0 200 400 600 800 1000 1200 1400
Ratio 0
2
4
6
8
T2K Run1−7c preliminary
0 1 2 3 4 5 6 7 8
Events
0
5
10
15
20
25 Prediction
Unoscillated
Best-Fit
Data
Reconstructed Energy [GeV]
0 1 2 3 4 5 6 7 8
Ratio
0
1
2
3
4
T2K Run1−7c preliminary
0 200 400 600 800 1000 1200 1400
Events
0
2
4
6
8
10
12
14
Prediction
Unoscillated
Best-Fit
Data
Reconstructed Momentum [MeV/c]
0 200 400 600 800 1000 1200 1400
Ratio
0
5
10
15
T2K Run1−7c preliminary
Appearance
channel
Disappearance
channel
sensitive
to
𝜃23 &
∆ 𝑚12
2
sensitive
to
𝜃13 &
𝛿CP
CPT
is
assumed
to
be
true](https://image.slidesharecdn.com/ezmyyjktt5meosnnqywe-signature-c6bd610224887eb0e15819666bbfff7379f4eee2caf56ca99545f0489981abb4-poli-170217062740/85/KEK-PH-2017-40-320.jpg)
![Results:
𝛿CP
2/17/17 KEK-‐PH2017 45
cpδ
3− 2− 1− 0 1 2 3
LikelihoodDensity
0
0.5
1
1.5
2
2.5
3
3.5
3−
10×
68.3%
90%
95%
T2K Run1−7c preliminary
Frequentist approach Bayesian
approach
² δCP =0
is
excluded
at
2 𝜎 CL.
² Mild
preference
of
normal
MH
² (Frequentist)
allowed
90%
Cl.
region
Normal
Hierarchy:
[-‐3.13,0.39]
Inverted
Hierarchy:
[-‐2.09,-‐0.74]
NH IH Sum
sin2θ23≤0.5 29% 10% 39%
sin2θ23>0.5 46% 14% 61%
Sum 75% 25% 100%
Bayesian
posterior
prob.
Confidence
intervals
is
computed
w/
Feldman-‐Cousins
method,
Credible
interval
use
flat
prior
for
δCP](https://image.slidesharecdn.com/ezmyyjktt5meosnnqywe-signature-c6bd610224887eb0e15819666bbfff7379f4eee2caf56ca99545f0489981abb4-poli-170217062740/85/KEK-PH-2017-45-320.jpg)
![Summary
2/17/17 KEK-‐PH2017
² Results
with
T2K
data
shown
o No
CPT
indication
from
o Consistent
with
𝜃23 maximal
mixing
o Slightly
prefer
normal
mass
hierarchy
o Slightly
favor
𝛿CP =
-‐ 𝜋/2
𝛿CP =
[-‐3.13,
-‐0.39]
(NH),
[-‐2.09,
-‐0.74]
(IH)
at
90%
C.L.
à More
statistics
are
needed
² J-‐PARC
beam
power
has
steadily
increased
up
to
420
kW
(operating
at
470
kW
recently)à key
roles
for
neutrino
measurements
² Neutrino
physics
roadmap
in
Japan
is
clear
and
exciting
Stay
tuned
for
upcoming
results
from
T2K
56
*Number
of
anime
taken
http://higgstan.com](https://image.slidesharecdn.com/ezmyyjktt5meosnnqywe-signature-c6bd610224887eb0e15819666bbfff7379f4eee2caf56ca99545f0489981abb4-poli-170217062740/85/KEK-PH-2017-56-320.jpg)
Uploaded bySon Cao
KEK PH 2017
The document discusses neutrino oscillations and the T2K experiment. It provides a brief history of neutrino discoveries and outlines the current neutrino oscillation model. The T2K experiment uses a neutrino beam produced at J-PARC that travels 295 km to the Super-Kamiokande detector. Recent T2K results and future prospects are discussed. The document raises several open questions in neutrino physics that ongoing experiments hope to address.
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KEK PH 2017
- 1. S. Cao IPNS, KEK Results and Prospects from T2K 2/17/17 KEK-‐PH2017 Ø Neutrino Oscillation landscape Ø T2K & recent results Ø Future prospects
- 2. Brief neutrino history 2/17/17KEK-‐PH2017 2 Credit to APS ² 1930: On-‐paper appearance as “desperate” remedy by W. Pauli ² 1956: first experimentally discovered by Reines and Cowan ² 1962: existence confirmed by Lederman et al. ² 1998: Atmospheric neutrino oscillations discovered by Super-‐K ² 2000: first evidence reported by DONUT experiment ² 2001: Solar neutrino oscillations detected by SNO (KamLAND 2002) ² 2011: transitions observed by OPERA ² 2011-‐13: by T2K, by Daya Bay(2012) ² 2015: Nobel prizes for 𝜈 oscillations, Breakthrough prize (2016) ¯⌫e ⌫µ ⌫⌧ ⌫µ ! ⌫⌧ ⌫µ ! ⌫e ¯⌫e ! ¯⌫e 2015 T2K observe 𝜈 𝜇 à𝜈e appearance Nobel & Breakthrough for 𝜈 oscillations
- 3. 2/17/17 KEK-‐PH2017 3 "for the discovery of neutrino oscillations, which shows that neutrinos have mass"
- 4. Standard Model & neutrino oscillations 32/17/17 KEK-‐PH2017 Source: AAAS 0 @ ⌫e ⌫µ ⌫⌧ 1 A = 0 @ 1 0 0 0 c23 s23 0 s23 c23 1 A 0 @ c12 s12 0 s12 c12 0 0 0 1 1 A 0 @ c13 0 s13e i CP 0 1 0 s13ei CP 0 c13 1 A 0 @ ⌫1 ⌫2 ⌫3 1 APontecorvo (1957) Maki, Nakagawa Sakata (1962) Majorana (1937) Standard Model: ² Neutrinos interact through the weak interaction ² Lepton flavor is strictly conserved ² Neutrinos have zero mass Neutrino oscillations: ² Indicate massive neutrinos ² Mix flavor and mass eigenstates ² Beyond Standard Model Flavor eigenstates Mass eigenstates The only lab-‐based evidence
- 5. Standard Model & neutrino oscillations Standard Model: ² Neutrinos interact through the weak interaction ² Lepton flavor is strictly conserved ² Neutrinos have zero mass Neutrino oscillations: ² Indicate massive neutrinos ² Mix flavor and mass eigenstates ² Beyond Standard Model 42/17/17 KEK-‐PH2017 Reactors / acceleratorSolar / reactors 0 @ ⌫e ⌫µ ⌫⌧ 1 A = 0 @ 1 0 0 0 c23 s23 0 s23 c23 1 A 0 @ c12 s12 0 s12 c12 0 0 0 1 1 A 0 @ c13 0 s13e i CP 0 1 0 s13ei CP 0 c13 1 A 0 @ ⌫1 ⌫2 ⌫3 1 A Source: AAAS cij = cos ✓ij, sij = sin ✓ij Atmospherics / Accelerators
- 6. Neutrino oscillation landscape 2/17/17 KEK-‐PH2017 6 Gonzalez-‐Garcia et al., arXiv:1512.06856 ⌫e ⌫µ ⌫⌧ Normal hierarchy Inverted hierarchy m2 lightest m2 lightest 0 @ ⌫e ⌫µ ⌫⌧ 1 A = 0 @ 1 0 0 0 c23 s23 0 s23 c23 1 A 0 @ c12 s12 0 s12 c12 0 0 0 1 1 A 0 @ c13 0 s13e i CP 0 1 0 s13ei CP 0 c13 1 A 0 @ ⌫1 ⌫2 ⌫3 1 A sign( m2 32) = ? ✓23 is maximal ? CP = ? mlightest = ? m2 32 m2 31 m2 21 m2 21 ⌫1 ⌫2 ⌫3 ⌫1 ⌫2 ⌫3 m2 21 = 7.50+0.19 0.17 ⇥ 10 5 eV2 m2 31 = 2.457+0.047 0.047 ⇥ 10 3 eV2 ✓13 = 8.50+0.20 0.21( ) ✓12 = 33.48+0.78 0.75( ) ✓23 = 42.3+3.0 1.6( ) m2 ij = m2 ⌫i m2 ⌫j Global fit – Normal hierarchy
- 7. Opening questions (1) 2/17/17KEK-‐PH2017 7 Credit to H. Murayama q How do neutrinos get mass? q Why are their masses so small?
- 8. Opening questions (2) 2/17/17KEK-‐PH2017 8 arXiv:1212.6374 q Why does PMNS matrix differ from CKM matrix? *Area of the squares represents square of matrix elements
- 9. Opening questions (3) 2/17/17KEK-‐PH2017 9 q What is neutrino’s role in Universe evolution? q Where is anti-‐matter? Credit: NASA/WMAP Science Team Source: scienceabc.com
- 10. Opening questions (3-‐cont’d) 2/17/17KEK-‐PH2017 10 q Can it be due to CP-‐violating decays of heavy neutrinos? 1,000,000,001 Baryons 1,000,000,001 Anti-‐Baryons 1,000,000,002 Baryons 1,000,000,000 Anti-‐Baryons Begin of Universe Shortly after ? CP-‐violating decays (B = 0; L ≠ 0) Sphaleron Process (B ≠ 0; L ≠ 0)(Fukugita, Yanagida)
- 11. Opening questions (3-‐cont’d) 2/17/17KEK-‐PH2017 11 Credit to B. Kayser q CP-‐violating phase in heavy neutrino decays leads to CP-‐ violating phase in the light neutrino mixing Measure CP violation phase in neutrino mixing via neutrino oscillations wanted!!!
- 12. 𝜈 oscillation measurement 2/17/17KEK-‐PH2017 12 It’s about probability measurement, basic needs: ü Source of well-‐understood neutrino flavor composition ü Detector at optimal baseline, enable to distinguish flavors ü Neutrino energy is necessary to known Defined baseline 𝜈 source 𝜈 detector Theoretical, simple
- 13. 𝜈 oscillation measurement (cont’d) 2/17/17 KEK-‐PH2017 13 It’s about probability measurement, basic needs: ü Source of well-‐understood neutrino flavor composition q Neutrino weak interactionà powerful source q Flux uncertainty ü Detector at optimal baseline, enable to distinguish flavors q Uncertainty in neutrino-‐nuclei interactionà interaction uncertainty q Response is not perfect, misidentify flavor à detector uncertainty ü Neutrino energy is necessary to known q Typically not mono-‐energy neutrino source q Can bias in reconstructing neutrino energy Defined baseline 𝜈 source 𝜈 detector Experimental, NOT simple
- 14.
- 15. T2K experiment 2/17/17 15KEK-‐PH2017 ²Long-‐baseline neutrino experiment, located in Japan ² Large collaboration: ~470 physicists from 63 institutes/ 11 nations ² Rich programs: standard neutrino oscillations, non-‐standard physics search, neutrino interactions
- 16. J-‐PARC neutrino beam line 2/17/17 ² High intensity, almost pure muon (anti) neutrino beam from J-‐PARC 16KEK-‐PH2017 ² 30 GeV p extracted from J-‐PARC main ring, impinge on 90-‐cm, graphite target ² Induced 𝜋+ (𝜋-‐) focused by three horns, pass through a 96-‐m decay pipe ² Beam dump to stop all particles except neutrinos and high-‐energy muons ² Muon monitor, downstream of beam dump, to monitor beam intensity and direction by measuring induced muon profile. 1.9 ⇥ int
- 17. Beam power and data accumulation 2/17/17 KEK-‐PH2017 17 Maximumbeampowerachievedsofar459.6kW 23 January 2010 - 19 January 2017 POT total: 18.29×"#$# % mode POT: 10.68×"#$# (58%) %& mode POT: 7.62×"#$# (42%) ² Beam power steadily increased to 470 kW recently! ² 1.8x1021 Protons-‐on-‐target (POT) delivered until Jan 19th. Data sample for results presented today: ² Neutrino-‐mode: 7.48x1020 POT ² Antineutrino-‐mode: 7.47x1020 POT Today result
- 18. Neutrino flux inference 2/17/17 ²High intensity, almost pure muon (anti) neutrino beam from J-‐PARC 18KEK-‐PH2017 ² To infer neutrino flux, knowledge of hadron production at target needed ² Constrained by external data from NA61/SHINE Flux uncertainty ~ 10% (absolute error) 𝜈̅ mode < 1%(⌫e/⌫e) < 1%(⌫e/⌫e) T2K Far Detector T2K Far Detector T2K Far Detector T2K Far Detector (Beam modes changed by switching horn polarity) ~3.7% effect to analysis w/ Near Detector constraint 𝝂-‐mode 𝝂-‐mode 𝜈̅ mode
- 19. Far Detector, Super-‐Kamiokande 2/17/17KEK-‐PH2017 19 (GeV)νE 0 1 2 3 (A.U.)295km µνΦ 0 0.5 1 °OA 0.0 °OA 2.0 °OA 2.5 0 1 2 3 )eν→µνP( 0.05 0.1 = 0CP δNH, = 0CP δIH, /2π=CP δNH, /2π=CP δIH, 0 1 2 3 )µν→µνP( 0.5 1 = 1.023θ22 sin = 0.113θ22 sin 2 eV-3 10×= 2.432 2 m∆ Partice ID parameter -10 -8 -6 -4 -2 0 2 4 6 8 10 0 50 100 150 200 250 300 350 Super Kamiokande IV 2166.5 days : Monitoring e-like muon-like Numberofevents ² Muon and electron are well-‐separated à identify 𝜈 𝜇/𝜈& with high purity ² Super-‐K is 2.50 off the beam’s axis to achieve narrow band beam peaked at oscillation maximum (0.6 GeV) (atmospheric 𝜈 data) Super-‐Kamiokande (41.4 m tall x 39.3m diameter) 22.5 ktons fiducial volume 1000m underground ⌫µ + n ! µ + p ⌫e + n ! e + p 2.5
- 20. Far Detector, Super-‐Kamiokande 2/17/17KEK-‐PH2017 20 ² Super-‐K is 2.50 off the beam’s axis to achieve narrow band beam peaked at oscillation maximum (0.6 GeV) ⌫µ + n ! µ + p ⌫e + n ! e + p 2.5 Short version Disappearance channel Appearance channel
- 21. T2K primary physics goals 2/17/17 KEK-‐PH2017 21 ⌫µ + n ! µ + p ⌫e + n ! e + p Disappearance channel (GeV)νE 0.5 1 1.5 2 2.5 3 Osc.Prob 0 0.5 1 flux µ νOff-axis°2.5 =0.523θ2 , sin2 eV -3 =2.5x1032 2 m∆ µν→µν=µν→µν q Sensitive to 𝜃23 and 𝛥m2 31 (atmospheric sector) à Precision measurement ( 𝜃23 is maximal?) q CPT symmetry test by comparing disappearance in muon neutrinos and muon anti-‐neutrinos
- 22. T2K primary physics goals 2/17/17 KEK-‐PH2017 22 ⌫µ + n ! µ + p ⌫e + n ! e + p Appearance channel (GeV)νE 0.5 1 1.5 2 2.5 3 Osc.Prob 0 0.02 0.04 0.06 0.08 0.1 flux µ νOff-axis°2.5 ν, NH,°=0cpδ ν, NH,°=270cpδ ν, NH,°=0cpδ ν, NH,°=270cpδ eν→µν,eν→µν q Sensitive to 𝜃13 and 𝛿CP o Degeneracy 𝜃13 -‐ 𝛿CP is difficult to disentangle with long baseline experiment à Need constraint from reactor measurement on 𝜃13 (or high statistics) q 20-‐30% effect of 𝛿CP and 10% effect of mass hierarchy (not too long baseline 295km) Large CP effect Small matter effect (in vacuum) (in matter)
- 23. Far Detector: Event selections 2/17/17 KEK-‐PH2017 23 ⌫e + n ! e + p Energy info. needed à Enrich charged current quasi elastic events FCFV 1-ring -likeµ µ p Decay-e Numberofevents 0 200 400 RUN1-7 data )POT 20 10×(7.482 CC QEµν CC QEµν CC non-QEµν+µν CCeν+eν NC FCFV 1-ring e-like Evis Decay-e rec ν E fiTQun Numberofevents 0 200 400 RUN1-7 data )POT 20 10×(7.482 CCeνOsc. CCeνOsc. CCµν/µν CCeν/eνBeam NC Charged particle should be µ± Pµ > 200 Mev/c: remove ⇡ and e Decay e < 2: reject invisible ⇡ • FCFV: Fully contained in fiducial volume • 1-‐ring: One charged-‐particle for CCQE Charged particle should be e± No decay e : # invisible µ/⇡ Evis > 100 MeV: # low E bkg. Erec ⌫ < 1.25 GeV: # intrinsic beam ⌫e. “fiTQun”: # NC ⇡0 CCQE-‐enhanced CCQE-‐enhanced ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎
- 24. Far Detector: Event selections 2/17/17 KEK-‐PH2017 24 ⌫e + n ! e + p Energy info. needed à Enrich charged current quasi elastic events FCFV 1-ring -likeµ µ p Decay-e Numberofevents 0 200 400 RUN1-7 data )POT 20 10×(7.482 CC QEµν CC QEµν CC non-QEµν+µν CCeν+eν NC FCFV 1-ring e-like Evis Decay-e rec ν E fiTQun Numberofevents 0 200 400 RUN1-7 data )POT 20 10×(7.482 CCeνOsc. CCeνOsc. CCµν/µν CCeν/eνBeam NC CCQE-‐enhanced CCQE-‐enhanced
- 25. Theoretically, neutrino beam from J-‐PARC and Super-‐Kamiokande are enough. However, experimentally, we need more.. 2/17/17 KEK-‐PH2017
- 26. Near Detectors 2/17/17 KEK-‐PH201726 ² Near Detector complex is 280m downstream of target It’s about probability measurement, basic needs: ü Source of well-‐understood neutrino flavor composition q Neutrino weak interactionà powerful source q Flux uncertainty ü Detector at optimal baseline, enable to distinguish flavors q Uncertainty in neutrino-‐nuclei interactionà interaction uncertainty q Response is not perfect, misidentify flavor à detector uncertainty ü Neutrino energy is necessary to known q Typically not mono-‐energy neutrino source q Can bias in reconstructing neutrino energy Built for these particular purposes
- 27. Near Detectors (cont’d) 2/17/17KEK-‐PH2017 27 ² Near Detector complex is 280m downstream of target On-‐axis (called INGRID) Measure 𝜈 beam intensity & profile: 16 scintillator-‐steel interleaved modules (7.1 tons/each) Off-‐axis (called ND280) Understand unoscillated 𝜈 beam: further constrain flux and cross-‐ section parameters
- 28. Near Detectors measurements 28 Day [events/1e14POT] 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 Eventrate Horn250kA Horn205kA Horn-250kA [mrad] 1− 0.5− 0 0.5 Horizontal beam direction INGRID MUMON Day [mrad] 1− 0.5− 0 0.5 1 Vertical beam direction INGRID MUMON T2K Run1 Jan.2010-Jun.2010 T2K Run2 Nov.2010-Mar.2011 T2K Run3 Mar.2012-Jun.2012 T2K Run4 Oct.2012-May.2013 T2K Run5 May.2014 -Jun.2014 T2K Run6 Oct.2014-June.2015 T2K Run7 Feb.2016-May.2016 2/17/17 KEK-‐PH2017 Measured data Off-‐axis neutrino energy strongly depend on beam direction (1mrad ~ 2% shift of peak energy) T2K controlled off-axis better than 1mrad Position from Designed beam center[cm] 400− 200− 0 200 400 Numberofevents 0 10 20 30 40 50 60 70 80 3 10× / ndf2χ 10.8 / 4 Constant 161.1±7.168e+04 Mean 1.099±2.428− Sigma 1.795±437.6 / ndf2χ 10.8 / 4 Constant 161.1±7.168e+04 Mean 1.099±2.428− Sigma 1.795±437.6 Position from Designed beam center[cm] 400− 200− 0 200 400Numberofevents 0 10 20 30 40 50 60 70 80 3 10× / ndf2χ 39.29 / 4 Constant 163.3±7.392e+04 Mean 1.158±4.593 Sigma 1.979±456 / ndf2χ 39.29 / 4 Constant 163.3±7.392e+04 Mean 1.158±4.593 Sigma 1.979±456 Data for each module Fitted Gaussian Horizontal Vertical
- 29. Near Detectors measurements (cont’d) 2/17/17 KEK-‐PH2017 29 Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 500 1000 1500 2000 2500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC0pi Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 50 100 150 200 250 300 350 400 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC1pi Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 50 100 150 200 250 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CCres Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CC1trk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 5 10 15 20 25 30 35 40 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CCNtrk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 10 20 30 40 50 60 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CC1trk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 5 10 15 20 25 30 35 40 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CCNtrk
- 30. Near Detectors measurements (cont’d) 302/17/17 KEK-‐PH2017 Cross-‐section parameters Constrain 𝜈-‐int. model (GeV)νE -1 10 1 10 FluxParameterValue 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 Prior to ND280 Constraint After ND280 Constraint beam modeν,µνND280 flux Flux parameters ? Need to know how neutrinos see nuclei (parameterization) Observable Nuclear target
- 31. Near Detectors measurements (cont’d) 312/17/17 KEK-‐PH2017 Reconstructed Neutrino Energy (GeV) 0 0.2 0.4 0.6 0.8 1 1.2 Eventsperbin 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 error (w/o ND280)σ1± errorσ1± Reconstructed Neutrino Energy (GeV) 0 0.2 0.4 0.6 0.8 1 1.2 Eventsperbin 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 error (w/o ND280)σ1± errorσ1± Reconstructed Neutrino Energy (GeV) 0 0.5 1 1.5 2 2.5 Eventsperbin 0 2 4 6 8 10 error (w/o ND280)σ1± errorσ1± Reconstructed Neutrino Energy (GeV) 0 0.5 1 1.5 2 2.5 Eventsperbin 0 0.5 1 1.5 2 2.5 3 3.5 4 error (w/o ND280)σ1± errorσ1± Total 𝛥NSK /NSK Beam mode Sample w/o ND280 w/ ND280 𝝂 12.0% 5.0% 𝝂 11.9% 5.4% 𝜈̅ 12.5% 5.2% 𝜈̅ 13.7% 6.2%
- 32. Quest for THEORISTS (1) 322/17/17 KEK-‐PH2017 To THEORISTS (1): We need you here! For better understand neutrino-‐nuclei interactions. ? Need to know how neutrinos see nuclei (parameterization) Observable Nuclear target
- 33.
- 34. 2/17/17 KEK-‐PH2017 ² Oscillation dip is clearly observed ² Four physics parameters are fitted: and Results: 𝜈* disappearance 0 1 2 3 4 5 6 7 8 Events/100MeV 0 10 20 30 40 50 60 70 80 90 Prediction Unoscillated Best-Fit Data Reconstructed Energy [GeV] 0 1 2 3 4 5 6 7 8 Ratio 0 0.5 1 1.5 2 2.5 T2K Run1−7c preliminary 0 1 2 3 4 5 6 7 8 Events/100MeV 0 5 10 15 20 25 Prediction Unoscillated Best-Fit Data Reconstructed Energy [GeV] 0 1 2 3 4 5 6 7 8 Ratio 0 0.5 1 1.5 2 2.5 T2K Run1−7c preliminary Neutrino Anti-‐neutrino Beam mode Unoscillated pred. Data Neutrino 521.8 135 Anti-‐neutrino 184.8 66 sin2 ✓23, | m2 32| sin2 ✓23, | m2 32| sin2 2✓23 / | m2 32| sin2 ✓23 / | m2 32|
- 35. 2/17/17 KEK-‐PH2017 Neutrino vs. Anti-‐neutrino (T2K only) Compare to other experiments in the world ² No difference between muon neutrino disappearance and muon anti-‐neutrino disappearance ² Good agreement w/ antineutrino data from other experiments Results: 𝜈* disappearance
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- 37. 2/17/17 KEK-‐PH2017 Results: 𝜈&+ appearance energy (MeV)νReconstructed 0 500 1000 Numberofevents 0 5 10 15 RUN1-7 data )POT 20 10×(7.482 CCeνOsc. CCeνOsc. CCµν/µν CCeν/eνBeam NC Sample Prediction at true δCP Data -‐𝝅/2 0 +𝝅/2 28.7 24.1 19.6 32 6.0 6.9 7.7 4 energy (MeV)νReconstructed 0 500 1000 Numberofevents 0 1 2 3 4 RUN5-7 data )POT 20 10×(7.471 CCeνOsc. CCeνOsc. CCµν/µν CCeν/eνBeam NC
- 38. 2/17/17 KEK-‐PH2017 Results: 𝜈&+ appearance energy (MeV)νReconstructed 0 500 1000 Numberofevents 0 1 2 3 4 RUN5-7 data )POT 20 10×(7.471 CCeνOsc. CCeνOsc. CCµν/µν CCeν/eνBeam NC ² Test for 𝜈* → 𝜈&+ hypothesis w/single para. 𝞫 ² 𝞫 = 0: No 𝜈* → 𝜈&+ ² 𝞫 = 1: 𝜈* → 𝜈&+ appearance consistent w/ PMNS ² Use all four T2K samples to fully constrain oscillation prob. Rate only No evidence for 𝜈* → 𝜈&+ More data is needed.
- 39. T2K Results 2/17/17 KEK-‐PH2017 Appearance channel Disappearance channel Joint Analysis
- 40. Oscillation parameters extracted from T2K data 2/17/17 KEK-‐PH2017 40 0 1 2 3 4 5 6 7 8 Events 0 10 20 30 40 50 60 70 80 90 Prediction Unoscillated Best-Fit Data Reconstructed Energy [GeV] 0 1 2 3 4 5 6 7 8 Ratio 0 1 2 3 4 T2K Run1−7c preliminary 0 200 400 600 800 1000 1200 1400 Events 0 0.5 1 1.5 2 2.5 3 3.5 Prediction Unoscillated Best-Fit Data Reconstructed Momentum [MeV/c] 0 200 400 600 800 1000 1200 1400 Ratio 0 2 4 6 8 T2K Run1−7c preliminary 0 1 2 3 4 5 6 7 8 Events 0 5 10 15 20 25 Prediction Unoscillated Best-Fit Data Reconstructed Energy [GeV] 0 1 2 3 4 5 6 7 8 Ratio 0 1 2 3 4 T2K Run1−7c preliminary 0 200 400 600 800 1000 1200 1400 Events 0 2 4 6 8 10 12 14 Prediction Unoscillated Best-Fit Data Reconstructed Momentum [MeV/c] 0 200 400 600 800 1000 1200 1400 Ratio 0 5 10 15 T2K Run1−7c preliminary Appearance channel Disappearance channel sensitive to 𝜃23 & ∆ 𝑚12 2 sensitive to 𝜃13 & 𝛿CP CPT is assumed to be true
- 41. Observed data vs. prediction 2/17/17 KEK-‐PH2017 41 Other oscillation parameter sin2 ✓13 = 0.0217, sin2 ✓23 = 0.528, m2 32( m2 13) = 2.509 ⇥ 10 3 eV 2 /c4 , sin2 ✓12 = 0.846, m2 21 = 7.53 ⇥ 10 5 eV 2 /c4
- 42. Results: 𝜃23& ∆ 𝑚12 2 2/17/17 KEK-‐PH2017 ² 𝜈 𝜇 disappearance behaves consistently w/ 𝜈* disappearance ² Result consistent with maximal mixing ² The world’s highest precision 𝜃23 measurement 42 Normal MH Inverted MH sin2 𝜃23 0.53289.9:; <9.9=: 0.53489.9:: <9.9=1 ∆𝑚12 2 /1081 (eV2) 2.54589.9;= <9.9;A 2.51089.9;1 <9.9;A 𝜈: 7.48x1020 POT + 𝜈̅: 7.47x1020 POT T2K Run1-‐7b preliminary T2K Run1-‐7b preliminary
- 43. Results: 𝜃13& 𝛿CP – T2K data only 2/17/17 KEK-‐PH2017 43 ² Measured 𝜃13 w/ T2K data only agrees w/ reactor measurement ² Disfavor region of δCP at ≅ 𝝅/2 ² Favor δCP at ≅ -‐𝝅/2 for both hierarchies 13θ2 sin 0 0.02 0.04 0.06 0.08 0.1 CPδ -3 -2 -1 0 1 2 3 NH Asimov Sensitivity IH Asimov Sensitivity T2K Run1−7c preliminary 13θ2 sin 0 0.02 0.04 0.06 0.08 0.1 CPδ -3 -2 -1 0 1 2 3 NH - Run1-7 IH - Run1-7 T2K Run1−7c preliminary Mass hierarchy is fixed, either normal or inverted and compute independently T2K-‐only Sensitivity T2K-‐only data fit Reactor (PDG 2015) Sample Prediction at true δCP Data -‐𝝅/2 0 +𝝅/2 28.7 24.1 19.6 32 6.0 6.9 7.7 4
- 44. Results: 𝜃13& 𝛿CP – T2K data + Reactors 2/17/17 KEK-‐PH2017 44 13θ2 sin 0.0160.018 0.02 0.0220.0240.0260.028 0.03 0.0320.0340.036 CPδ -3 -2 -1 0 1 2 3 NH Asimov Sensitivity IH Asimov Sensitivity T2K Run1−7c preliminary 13θ2 sin 0.0160.018 0.02 0.0220.0240.0260.028 0.03 0.0320.0340.036 CPδ -3 -2 -1 0 1 2 3 NH - Run1-7 IH - Run1-7 T2K Run1−7c preliminary T2K + reactor Sensitivity T2K + reactor data fit Reactor (PDG 2015) Reactor (PDG 2015) Mass hierarchy is fixed, either normal or inverted and compute independently Sample Prediction at true δCP Data -‐𝝅/2 0 +𝝅/2 28.7 24.1 19.6 32 6.0 6.9 7.7 4 ² Disfavor region of δCP at ≅ 𝝅/2 ² Favor δCP at ≅ -‐𝝅/2 for both hierarchies
- 45. Results: 𝛿CP 2/17/17 KEK-‐PH2017 45 cpδ 3− 2− 1− 0 1 2 3 LikelihoodDensity 0 0.5 1 1.5 2 2.5 3 3.5 3− 10× 68.3% 90% 95% T2K Run1−7c preliminary Frequentist approach Bayesian approach ² δCP =0 is excluded at 2 𝜎 CL. ² Mild preference of normal MH ² (Frequentist) allowed 90% Cl. region Normal Hierarchy: [-‐3.13,0.39] Inverted Hierarchy: [-‐2.09,-‐0.74] NH IH Sum sin2θ23≤0.5 29% 10% 39% sin2θ23>0.5 46% 14% 61% Sum 75% 25% 100% Bayesian posterior prob. Confidence intervals is computed w/ Feldman-‐Cousins method, Credible interval use flat prior for δCP
- 46. Perception from data 2/17/17KEK-‐PH2017 46 NSK/NSK
- 47. Prospect for the future 2/17/17 KEK-‐PH2017
- 48. Medium term: T2K-‐II proposal 2/17/17 KEK-‐PH2017 ² Approved T2K statistics, 7.8 x1021 POT, can be accumulated by JFY2020 ² Hyper-‐K and DUNE are expected to start around 2026 ² T2K-‐II, if extended to JFY2026, collects ~ 20x1021 POTà Stage I approval ² Neutrino beamline upgrade & analysis improvements (SK fiducial volume, add new event sample) à Effectively add 50% statistics ² Reduction of systematic uncertainties to enhance CPV sensitivity 48 Number of events expected at T2K far detector with full proposed T2K Phase 2 exposure J-‐PARC Main Ring expected beam power & T2K Phase 2 accumulation scenario
- 49. Medium term: T2K-‐II proposal 2/17/17 )21 Protons-on-Target (x10 0 5 10 15 20 =0CPδtoexcludesin2 χ∆ 0 5 10 15 =0.4323 θ2 True sin =0.5023 θ2 True sin =0.6023 θ2 True sin 90% C.L. 99% C.L. C.L.σ3 w/ eff. stat. improvements (no sys. errors) w/ eff. stat. & sys. improvements Work in Progress )°(CP δTrue 200− 100− 0 100 200 =0CPδtoexcludesin2 χ∆ 0 5 10 15 20 =0.4323θ2 True sin =0.5023θ2 True sin =0.6023θ2 True sin 90% C.L. 99% C.L. C.L.σ3 POT w/ eff. stat. & sys. improvements21 20x10 POT w/ 2016 sys. errs.21 7.8x10 Work in Progress CP = ⇡ 2 ² > 3 𝜎 significance sensitivity to CP violation if 𝛿CP= -‐ 𝜋/2 ² 99% C.L. significance for more than 45% of the possible true values of 𝛿CP ² 1% precision of 𝛥m2 23, 0.5o -‐ 1.7o precision of 𝜃23 depending on its true value, ~3𝜎 significance for resolving 𝜃23 octant if sin2 𝜃23 >0.6 or sin2 𝜃23 <0.43 23 θ2 sin 0.4 0.5 0.6 32 2 m∆ 2.2 2.4 2.6 2.8 3 3− 10× Current POT , 90% C.L POT, 90% C.L21 7.8x10 POT w/improvement, 90% C.L21 20x10 Stat. only Systematics Work in Progress True sin2 ✓23 = 0.6 KEK-‐PH2017 49
- 50. Medium term: ND280 update 2/17/17 KEK-‐PH2017 50 Goal: Understand better 𝝂 interaction Minimum requirements: + Water target + Large angular acceptance + Better efficiency for detecting low momentum of p and 𝜋 Detector design in progress Target option
- 51. Medium term: Intermediate WC detector 2/17/17 KEK-‐PH2017 51 52.5 m tall WC detector, spanning 1o-‐4o off the beam center, 1km from target ² Water target ² 4𝜋 angular acceptance ² Signal and background ² Flux prediction largely independent to neutrino interaction model Physics goals: ² Oscillation analysis w/ modest need of neutrino interaction model ² Sterile neutrino search Same as Super-‐K Separate collaboration from T2K Receive stage-‐1 status as E-‐62 exp. (from July 2016) Design concept
- 52. Longer term: Hyper-‐Kamiokande 2/17/17KEK-‐PH2017 52 Gigantic WC detector, 520 kton (ref. 50 kton of Super-‐K ), aim to start operation in 2026 ² Neutrino CP violation up to > 5 𝜎 ² Neutrino mass hierarchy ² Also for proton decay, supernova… Selected as one of important large scale projects by SCJ T2KK: Move 2nd Hyper-‐K tank to Korea? + CP violation at 2nd osc. peak + Enhance matter effect
- 53. Longer term: Hyper-‐Kamiokande 2/17/17KEK-‐PH2017 53 Brief story of K Prof. M. Koshiba Prof. T. Kajita 2002 2015
- 54. Quest for THEORISTS (2) 2/17/17 KEK-‐PH2017 54 NSK/NSK To THEORISTS (2): How can we sure what we measure is CP violation phase? The CP violation sensitivity is based on standard framework. Experimentalists measure merely probabilities and can be fooled by ² Sterile neutrinos ² Non-‐standard interactions ² ….
- 55. Quest for THEORISTS (3) 2/17/17 KEK-‐PH2017 55 NSK/NSK arXiv:1410.8056 Assume CP is observed, the next targets are probably precision of CP phase and PMNS unitary testing To THEORISTS (3): Can we have more “predictable” model? say, on CP phase, unitary of matrix for example
- 56. Summary 2/17/17 KEK-‐PH2017 ² Results with T2K data shown o No CPT indication from o Consistent with 𝜃23 maximal mixing o Slightly prefer normal mass hierarchy o Slightly favor 𝛿CP = -‐ 𝜋/2 𝛿CP = [-‐3.13, -‐0.39] (NH), [-‐2.09, -‐0.74] (IH) at 90% C.L. à More statistics are needed ² J-‐PARC beam power has steadily increased up to 420 kW (operating at 470 kW recently)à key roles for neutrino measurements ² Neutrino physics roadmap in Japan is clear and exciting Stay tuned for upcoming results from T2K 56 *Number of anime taken http://higgstan.com
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- 59. Backup: CP & MH effect 2/17/17 KEK-‐PH2017 59 NSK/NSK )eν→µνP( 0 0.02 0.04 0.06 0.08 )eν→µνP( 0 0.02 0.04 0.06 0.08 -3 10×|=2.4232 2 m∆| -5 10×|=7.5421 2 m∆| =0.9523θ22 sin =0.8812 θ22 sin =0.0913θ22 sin L=295 km =0.6 GeVνE >032 2 m∆ <032 2 m∆ =0CP δ /2π=CPδ π=CP δ /2π=3CPδ High octant Low octant ² Negative CP enhances electron neutrino appearance and suppresses electron antineutrino appearance ² MH enhances electron neutrino appearance and suppresses electron antineutrino appearance
- 60. Backup: Accelerator update schedule 2/17/17 KEK-‐PH2017 60 NSK/NSK PAC Jan 2017
- 61. Backup: Systematic error table 2/17/17 KEK-‐PH2017 61 NSK/NSK
- 62. Backup: Data fit vs sensitivity 2/17/17 KEK-‐PH2017 62 10k toys 10k toys ² Toy experiments at true values of 𝛿CP & MH generated to understand data fit outcomes ² Probability to exclude 𝛿CP = (0, 𝜋) is evaluated ² Data agree w/ 𝛿CP = -‐1.76 (~-‐𝜋/2), normal MH at 2 𝜎 level and probability to exclude 𝛿CP =0 is non-‐negligible (>8%) True: 𝛿CP = -‐1.76, normal MHTrue: 𝛿CP = 0, normal MH Prop. (%) to exclude True para. 𝛿CP = -‐1.76, NH True para. 𝛿CP = 0, NH 90% CL 2𝝈 90% CL 2𝝈 𝛿CP =0, NH 19.1 8.5 10.8 4.8 𝛿CP =𝜋, NH 15.7 6.5 14.9 6.7
- 63. Backup: Flux/ target 632/17/17KEK-‐PH2017
- 64. BANFF: flux RHC 2/17/17KEK-‐PH2017 ² 15% increase 64 (GeV)νE -1 10 1 10 FluxParameterValue 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 Prior to ND280 Constraint After ND280 Constraint beam modeν,eνND280 (GeV)νE -1 10 1 10 FluxParameterValue 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 Prior to ND280 Constraint After ND280 Constraint beam modeν,eνND280 (GeV)νE -1 10 1 10 FluxParameterValue 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 Prior to ND280 Constraint After ND280 Constraint beam modeν,µνND280 (GeV)νE -1 10 1 10 FluxParameterValue 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 Prior to ND280 Constraint After ND280 Constraint beam modeν,µνND280
- 65. T2K off-‐axis detector: ND280 2/17/17 KEK-‐PH2017 Aim to understand unoscillated 𝜈 beam: constrains flux and cross-‐section parameters ² Tracker, composed of Fine-‐Grained Detector (FGD) and Time Projection Chamber (TPC), is central part o Two FGDs: active target w/ scintillator only (FGD1) or scintillator-‐water interleaved (FGD2) o Three TPCs: mainly Argon (95%) filled, for momentum measurement and particle ID ² 𝜋0 detector (POD) for water-‐scintillator target and 𝜋0 tagging ² Electromagnetic calorimeters (ECal) to detect gamma rays and reconstruct 𝜋0 ² Side muon range detectors (SMRD) to tag entering cosmic muons or side-‐exiting muons Key features for cross-‐section: o Narrow flux spectrum , mean ~ 0.85 GeV o Multiple targets: scintillator, water, argon, lead o High final state ID resolution, charge separation 65 ~B 0.2 T
- 66.
- 67. About energy reconstruction 672/17/17KEK-‐PH2017 ? Issue raised recently No observation yet!
- 68. Pre-‐fit: muon momentum 2/17/17KEK-‐PH2017 68 Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 500 1000 1500 2000 2500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC0pi Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 50 100 150 200 250 300 350 400 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC1pi Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 50 100 150 200 250 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CCres Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CC1trk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 5 10 15 20 25 30 35 40 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CCNtrk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 10 20 30 40 50 60 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CC1trk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 5 10 15 20 25 30 35 40 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CCNtrk
- 69. Post-‐fit: muon momentum 2/17/17KEK-‐PH2017 69 Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 500 1000 1500 2000 2500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC0pi Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 50 100 150 200 250 300 350 400 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC1pi Muon momentum (MeV/c) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Events/(100MeV/c) 0 50 100 150 200 250 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CCres Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CC1trk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 5 10 15 20 25 30 35 40 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CCNtrk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 10 20 30 40 50 60 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CC1trk Muon momentum (MeV/c) 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Events/(100MeV/c) 0 5 10 15 20 25 30 35 40 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CCNtrk
- 70. Pre-‐fit: muon angle 2/17/17KEK-‐PH2017 ² 2x3 sample for neutrinos (FGD1,2) ² 2x4 sample for anti-‐ neutrinos (FGD1,2) 70 θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CC1trk θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CCNtrk θMuon cos 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 Events/(0.01) 0 200 400 600 800 1000 1200 1400 1600 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC0pi θMuon cos 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 Events/(0.01) 0 100 200 300 400 500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC1pi θMuon cos 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 Events/(0.01) 0 100 200 300 400 500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CCres θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 20 40 60 80 100 120 140 160 Data CCQEν non-CCQEν CCQEν non-CCQEν θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 20 40 60 80 100 120 140 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CC1trk FGD1, nu, CCNtrk
- 71. Post-‐fit: muon angle 2/17/17KEK-‐PH2017 71 θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CC1trk θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 50 100 150 200 250 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, Antinu, CCNtrk θMuon cos 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 Events/(0.01) 0 200 400 600 800 1000 1200 1400 1600 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC0pi θMuon cos 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 Events/(0.01) 0 100 200 300 400 500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CC1pi θMuon cos 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 Events/(0.01) 0 100 200 300 400 500 Data CCQEν CC 2p-2hν πCC Res 1ν πCC Coh 1ν CC Otherν NC modesν modesν FGD1, nu, CCres θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 20 40 60 80 100 120 140 160 Data CCQEν non-CCQEν CCQEν non-CCQEν θMuon cos 0.8 0.82 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 Events/(0.01) 0 20 40 60 80 100 120 140 Data CCQEν non-CCQEν CCQEν non-CCQEν FGD1, nu, CC1trk FGD1, nu, CCNtrk ² 2x3 sample for neutrinos (FGD1,2) ² 2x4 sample for anti-‐ neutrinos (FGD1,2)