Neutrino Oscillation Physics with a Neutrino Factory EPS-HEP Conference, Grenoble on behalf of IDS-NF Collaboration Paul Soler, 21 July 2011

EPS-HEP, Grenoble: 21st July 2011 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 study 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

EPS-HEP, Grenoble: 21st July 2011 Neutrino 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

EPS-HEP, Grenoble: 21st July 2011 Physics Case for a Neutrino Factory EPS-HEP, Grenoble: 21st July 2011

Neutrino Oscillations in Matter Matter oscillation results for three neutrinos: (MSW effect) Minakata & Nunokawa JHEP 2001 where is for EPS-HEP, Grenoble: 21st July 2011

Neutrino Oscillations in Matter Matter oscillation results for three neutrinos: (MSW effect) Only one term in equation Magic baseline: Clean determination of q13 Magic baseline only depends on value of density of Earth where is for EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Neutrino Oscillation fits Global fit provides: sin2q12=0.312+0.017-0.015 Dm212 =7.59+0.20-0.18×10-5 eV2 sin2q23=0.510.06 Dm312=2.450.09×10-3 eV2 Schwetz, Tortola, Valle Normal Inverted Hints for non-zero q13: NH(IH) T2K: 0.03(0.04)<sin2q13<0.28(0.34) (2.5s) MINOS: 0<sin2q13<0.12(0.19) (1.7s) Reactors: sin2q13=0.023+0.016-0.013 (2.3s) Combined: sin2q13=0.021(0.025)±0.007 Yet to be defined in detail: Confirm q13 value Is q23=p/4,<p/4 or >p/4? Mass hierarchy: sign Dm312 CP violation phase d EPS-HEP, Grenoble: 21st July 2011 Fogli et al.

EPS-HEP, Grenoble: 21st July 2011 Neutrino Factory Accelerator and Detectors EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Neutrino Factory Baseline Proton driver Proton beam ~8 GeV on target Target, capture and decay Create p, decay into m (MERIT) Bunching and phase rotation Reduce DE 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 Neutrino spectra calculable to high accuracy See poster on Neutrino Factory accelerator facility EPS-HEP, Grenoble: 21st July 2011

Baseline for a Neutrino Factory: MIND Golden channel signature: appearance of “wrong-sign” muons in magnetised iron calorimeter Magnetic Iron Neutrino Detector (MIND) IDS-NF simulations for 25 GeV NuFact: 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 n 50% wrong sign muon detector 50-100 m long 14mx14mx3cm plates Toroidal magnetic field: 1.0-2.2 T Engineering well advanced See poster on Neutrino Factory detectors EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 MIND analysis Curvature error (CC rejection) and NC rejection Num hits > 150 nm-CC nm-CC CC signal nm-CC nm-CC Kinematic cuts: Neutrino energy (En=Em+Ehad) vs EPS-HEP, Grenoble: 21st July 2011

MIND: CC and NC background Analysis with Nuance and GEANT4: anti-numu as numu numu as anti-numu CC background NC as numu NC as anti-numu NC background EPS-HEP, Grenoble: 21st July 2011

MIND: ne background and signal Analysis with Nuance and GEANT4: nue as numu anti-nue as anti-numu nue background numu efficiency anti-numu efficiency Signal efficiencies EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Near Detectors 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, sin2qW) n beam 3 m B>1 T ~20 m High Res Detector Mini-MIND Vertex Detector Two options EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Performance of a Neutrino Factory with MIND EPS-HEP, Grenoble: 21st July 2011

Flexible design of Neutrino Factory Optimisation for one baseline as function of q13 Contours of CP coverage For large q13: Energy 10 GeV Baseline 2000 km 100 kton MIND For small q13: Energy ~25 GeV Baseline ~4000 km 100 kton MIND EPS-HEP, Grenoble: 21st July 2011

Neutrino Factory performance Optimised performance for small q13 (25 GeV, two detectors) and large q13 (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

Neutrino Factory performance Optimised performance for small q13 (25 GeV, two detectors) and large q13 (10 GeV, 100 kton detector) MIND analysis EPS-HEP, Grenoble: 21st July 2011

Neutrino Factory performance Comparison Neutrino Factory and other facilities Neutrino Factory outperforms all other facilities EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Conclusions 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 q13 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 q13 (sin2 q13> 10-2) Conceptual design for near detector being established EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Backup slides EPS-HEP, Grenoble: 21st July 2011

Expected neutrino event rates in MIND sin22q13 nm CC ne CC nm + ne NC nm signal 4×10-2 2.5×105 7.0×105 3.1×105 1.2×104 5×10-5 7.2×105 3.2×105 2.2×102 Event rates 100 kton MIND at 4000 km (for 1021 m decays) Need 10-4 bkg suppression anti-numu CC nue CC anti-nu NC nu NC EPS-HEP, Grenoble: 21st July 2011

MIND: signal efficiency Difference in numu and anti-numu efficiencies: effectively only because of Bjorken y distribution (inelasticity) of neutrinos and antineutrinos nm-CC EPS-HEP, Grenoble: 21st July 2011

MIND: systematic errors Systematic errors: hadronic energy & angular resolution Systematic errors: ratio of QES/DIS, 1p/DIS, “Other”/DIS EPS-HEP, Grenoble: 21st July 2011

MIND: tau contamination Tau neutrino simulations using GENIE already implemented New results since IDR: nt signal right-sign nutau as numu anti-nutau as anti-numu New results since IDR: nt signal wrong-sign anti-nutau as numu nutau as anti-numu EPS-HEP, Grenoble: 21st July 2011

EPS-HEP, Grenoble: 21st July 2011 Roadmap EPS-HEP, Grenoble: 21st July 2011