neutrino oscillation physics with a neutrino factory
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Neutrino Oscillation Physics with a Neutrino Factory. EPS-HEP Conference, Grenoble on behalf of IDS-NF Collaboration. Paul Soler, 21 July 2011. International Design Study. International Design Study for a Neutrino Factory (IDS-NF) Principal objective: deliver Reference Design Report by 2013 - PowerPoint PPT PresentationTRANSCRIPT
Neutrino Oscillation Physics with a Neutrino Factory
EPS-HEP Conference, Grenobleon behalf of IDS-NF Collaboration
Paul Soler, 21 July 2011
EPS-HEP, Grenoble: 21st July 2011 2
International Design Study International Design Study International Design Study for a Neutrino Factory (IDS-NF)
― Principal objective: deliver Reference Design Report by 2013 Physics performance of the Neutrino Factory Specification of each of the accelerator, diagnostic, and detector
systems that make up the facility Schedule and cost of the Neutrino Factory accelerator, diagnostics,
and detector systems.
― Co-sponsored by EU through EUROnu― Web site: https://www.ids-nf.org/wiki/FrontPage
Interim Design Report: IDS-NF-020 delivered in 2011 ̶� IDR was used to measure progress in planning for these facilities
and detailed performance parameters at half way point of study̶� Reviewed by International Panel organised by ECFA, chaired by
Prof Francis Halzen (Wisconsin), at Daresbury Lab on 5-6 May 2011
Report this afternoon at joint ECFA-EPS session
EPS-HEP, Grenoble: 21st July 2011 3
Neutrino Factory BaselineNeutrino Factory Baseline
Two Magnetised Iron
Neutrino Detectors (MIND): – 100 kton at 2500-5000 km
– 50 kton at 7000-8000 km
Baseline constantly under review in light of new physics results
EPS-HEP, Grenoble: 21st July 2011 4
Physics Case for a Neutrino FactoryPhysics Case for a Neutrino Factory
EPS-HEP, Grenoble: 21st July 2011 5
Minakata &
Nunokaw
a JHE
P 2001
Neutrino Oscillations in MatterNeutrino Oscillations in Matter
E
mijij 2
2 eFnGA 2
Matter oscillation results for three neutrinos:
xB
xA
BAxJP
xB
xA
BAxJP
xA
AcP
xB
BsP
PPPPxPee
2sin
2sin
2sinsin
~
2sin
2sin
2coscos
~
2sin2sin
2sin2sin
)(
1312134
1312133
22
1212
22232
2
2
1313
22231
4321)(
AAB 131322
132
1313 2sin2coswith
where is for , 13231213 2sin2sin2sin~ cJ
(MSW effect)
EPS-HEP, Grenoble: 21st July 2011 6
Neutrino Oscillations in MatterNeutrino Oscillations in Matter
E
mijij 2
2 eFnGA 2
Matter oscillation results for three neutrinos:
xB
xA
BAxJP
xB
xA
BAxJP
xA
AcP
xB
BsP
PPPPxPee
2sin
2sin
2sinsin
~
2sin
2sin
2coscos
~
2sin2sin
2sin2sin
)(
1312134
1312133
22
1212
22232
2
2
1313
22231
4321)(
where is for , 13231213 2sin2sin2sin~ cJ
(MSW effect) Only one term
in equation
Magic baseline:
km760073002
xAx
Clean determination of 13
AAB 131322
132
1313 2sin2coswith
Magic baseline only depends
on value of density of Earth
EPS-HEP, Grenoble: 21st July 2011 7
Neutrino Oscillation fitsNeutrino Oscillation fits Global fit provides:
sin212=0.312+0.017-0.015
m212 =7.59+0.20
-0.18×10-5 eV2
sin223=0.510.06
m312=2.450.09×10-3 eV2
InvertedNormal
Schwetz, Tortola, Valle
Hints for non-zero 13: NH(IH)
T2K: 0.03(0.04)<sin213<0.28(0.34) (2.5)
MINOS: 0<sin213<0.12(0.19) (1.7)
Reactors: sin213=0.023+0.016-0.013 (2.3
Combined: sin213=0.021(0.025)±0.007Fogli et al.
Yet to be defined in detail: Confirm 13 value
Is 23=/4,</4 or >/4?
Mass hierarchy: sign m312
CP violation phase
EPS-HEP, Grenoble: 21st July 2011 8
Neutrino Factory Accelerator and Neutrino Factory Accelerator and DetectorsDetectors
EPS-HEP, Grenoble: 21st July 2011 9
e
e
e
e
Neutrino Factory BaselineNeutrino Factory Baseline Proton driver
– Proton beam ~8 GeV on target Target, capture and decay
– Create , decay into (MERIT) Bunching and phase rotation
– Reduce E of bunch Cooling
– Reduce transverse emittance (MICE)
Acceleration– 120 MeV 25 GeV with RLAs
and FFAG Decay rings
– Store for ~1000 turns– Long straight sections
e
e
e
e
Neutrino spectra calculable to high accuracySee poster on Neutrino Factory
accelerator facility
EPS-HEP, Grenoble: 21st July 2011 10
Golden channel signature: appearance of “wrong-sign” muons in magnetised iron calorimeter
Two far detectors:― 2500-5000 km baseline: 100 kton― 7000-8000 km (magic) baseline: 50 kton
Appearance of “wrong-sign” muons Segmentation:
― 3 cm Fe + 2 cm scintillator
Magnetic Iron Neutrino Detector (MIND)
e
e
50%
50%
wrongwrongsignsignmuonmuon
e
detectordetector
IDS-NF simulations for 25 GeV NuFact:
Baseline for a Neutrino Factory: Baseline for a Neutrino Factory: MINDMIND
50-100 m long
See poster on Neutrino Factorydetectors
14mx14mx3cm platesToroidal magnetic field:
1.0-2.2 T
Engineering well advanced
EPS-HEP, Grenoble: 21st July 2011 11
MIND analysisMIND analysis
incorrectpq
correctpq
/
/logl
lLq/p
NC
CC
1
1logll
L1
0.5- likelihood log /
/ pqpq
Curvature error (CC rejection) and NC rejection-CC
-CC-CC
-CC
Num hits > 150
hadt PQ 2sin Kinematic cuts: Neutrino energy (E=E+Ehad) vs
CC signal
NC
CC
1
1logll
L10.5- likelihood log /
/ pqpq
EPS-HEP, Grenoble: 21st July 2011 12
MIND: CC and NC backgroundMIND: CC and NC background Analysis with Nuance and GEANT4:
anti-numu as numu numu as anti-numu
NC as numu NC as anti-numu
CC background
NC background
EPS-HEP, Grenoble: 21st July 2011 13
MIND: MIND: ee background and signal background and signal Analysis with Nuance and GEANT4:
nue background
Signal efficiencies
nue as numu anti-nue as anti-numu
numu efficiency anti-numu efficiency
EPS-HEP, Grenoble: 21st July 2011 14
Near DetectorsNear Detectors
beam3 m
3 m
B>1 T
~20 m
High Res DetectorHigh Res DetectorMini-MINDMini-MIND
VertexVertexDetectorDetector
Two options
Near detector:– Neutrino flux (<1% precision) and extrapolation to far detector – Charm production (main background) and taus for Non Standard
Interactions (NSI) searches– Cross-sections and other measurements (ie PDFs, sin2W)
EPS-HEP, Grenoble: 21st July 2011 15
Performance of a Neutrino Factory with Performance of a Neutrino Factory with MINDMIND
EPS-HEP, Grenoble: 21st July 2011 16
Flexible design of Neutrino Flexible design of Neutrino FactoryFactory
Optimisation for one baseline as function of 13
For large 13:
Energy 10 GeV
Baseline 2000 km
100 kton MIND
For small 13:
Energy ~25 GeV
Baseline ~4000 km
100 kton MIND
Contours of CP coverage
EPS-HEP, Grenoble: 21st July 2011 17
Neutrino Factory performanceNeutrino Factory performance Optimised performance for small 13 (25 GeV, two detectors)
and large 13 (10 GeV, 100 kton detector) MIND analysis Performance based on 5 GeV, 1300 km, 20 kton
Totally Active Scintillator Detector (TASD, magenta)
EPS-HEP, Grenoble: 21st July 2011 18
Neutrino Factory performanceNeutrino Factory performance Optimised performance for small 13 (25 GeV, two detectors)
and large 13 (10 GeV, 100 kton detector) MIND analysis
EPS-HEP, Grenoble: 21st July 2011 19
Neutrino Factory performanceNeutrino Factory performance Comparison Neutrino Factory and other facilities
– Neutrino Factory outperforms all other facilities
EPS-HEP, Grenoble: 21st July 2011 20
ConclusionsConclusions International Design Study is progressing on course
– Interim Design Report delivered March 2011
– We had successful ECFA review May 2011 (final report due soon)
– On target to produce Reference Design Report, including performance and costs by 2013
Main concepts for accelerator systems have been defined – Main areas of work are at interfaces between components
Two Magnetised Iron Neutrino Detectors (MIND) at standard Neutrino Factory (25 GeV) is small 13 baseline:– 2500-5000 km with100 kton mass – 7000-8000 km (magic baseline) with 50 kton
10 GeV Neutrino Factory with one 100 kton MIND shows best performance for large 13 (sin2 13> 10-2)
Conceptual design for near detector being established
EPS-HEP, Grenoble: 21st July 2011 21
Backup Backup slidesslides
EPS-HEP, Grenoble: 21st July 2011 22
Expected neutrino event rates in Expected neutrino event rates in MINDMIND
Event rates 100 kton
MIND at 4000 km
(for 1021 decays)
nue CCanti-numu CC
anti-nu NCnu NC
sin2213 CC e CC + e NC signal
4×10-2 2.5×105 7.0×105 3.1×105 1.2×104
5×10-5 2.5×105 7.2×105 3.2×105 2.2×102
Need 10-4 bkg
suppression
EPS-HEP, Grenoble: 21st July 2011 23
MIND: signal efficiency MIND: signal efficiency
Difference in numu and anti-numu efficiencies: effectively only because of Bjorken y distribution (inelasticity) of neutrinos and antineutrinos
-CC
-CC
EPS-HEP, Grenoble: 21st July 2011 24
MIND: systematic errorsMIND: systematic errors Systematic errors: hadronic energy & angular resolution
Systematic errors: ratio of QES/DIS, 1/DIS, “Other”/DIS
EPS-HEP, Grenoble: 21st July 2011 25
MIND: tau contaminationMIND: tau contamination Tau neutrino simulations using GENIE already implemented
― New results since IDR: signal right-sign
nutau as numu anti-nutau as anti-numu
anti-nutau as numu nutau as anti-numu
― New results since IDR: signal wrong-sign
EPS-HEP, Grenoble: 21st July 2011 26
RoadmapRoadmap
Ph
ysic
sP
hys
ics
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08
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20
05
20
06
20
07
20
15
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14
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13
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Neutrino Factory roadmap
MICE
ISS
International Design Study
Neutrino Factory project
Interim Design Report
Reference Design Report
MERIT
EMMA
Detector and diagnostic systems development
EUROnu