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SciBooNE PAC Outline

SciBooNE PAC Outline. Section - Presenter (Author). SciBooNE PAC Outline -1. Introduction - TN Basics of neutrino oscillations (TN) As in ICFA talk K2K has shown or published (TN) (Show that we have seen many surprises in recent data) CCQE: low Q 2 anomaly, favors higher M A

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SciBooNE PAC Outline

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  1. SciBooNE PAC Outline • Section - Presenter (Author)

  2. SciBooNE PAC Outline -1 • Introduction - TN • Basics of neutrino oscillations (TN) • As in ICFA talk • K2K has shown or published (TN) • (Show that we have seen many surprises in recent data) • CCQE: low Q2 anomaly, favors higher MA • CC Coherent pi+ • More? • MB has shown (MOW) • CCQE: low Q2 anomaly • CCpi+: low Q2, 25% reduced cross section • NCpi0: lower coherent fraction • Oscillation goals for next gen. exps - TN (TN) • Motivate importance of good cross section measurements • Is 23=45? • What is 13? Mass hierarchy? • CP violation???

  3. SciBooNE PAC Outline - 2 • Low E cross sections - state of field - TN • Lipari plot/Flux comparison (TN) • Stress that flux is not contaminated by high energy tails • Relevance for oscillations (TN) • Describe which cross sections contribute to signal and backgrounds • Table of what’s covered/what’s going on (TN) • SciBooNE Description - TN • SciBar Detector (TN) • Detector configuration, MRD physics optimization • BNB (MOW) • HARP, E910 • Proton plan (MOW) • Site optimization

  4. SciBooNE PAC Outline - 3 • SciBooNE Measurements - MOW • SciBooNE Only (MOW) • Radiative Delta Decay • NCpi0 energy dependence • T2K (TN) • NCpi0 BG • CCpi+ • MiniBooNE (MOW) • WS BGs • Intrinsic nues

  5. SciBooNE PAC Outline - 4 • Logistics - MOW (MOW) • Outline general ideas • MRD materials • Costs • Include labor, money • Schedule • Collaboration • Students • Conclusions - MOW (MOW) • Can be important part of neutrino program at FNAL • Complementary to MINERvA (not competition) • Bring neutrino physicists to FNAL

  6. Thoughts on nm Signal and BG ss • Oscillation expts use CCQE events on nuclear targets for signal • Nuclear targeta provide more interactions, better statistics • Simple kinematics  good energy reconstruction • ne Appearance • Need to distinguish e from m in detector • BG = processes that fake ne oscillation signals (flavor BG) • Intrinsic ne • NCp0 • NCD decay • Affect counting experiment • nm Disappearance • Need to distinguish CCQE from other CC processes • BG = processes that fake QE signal (n-interaction BG) • CC1p+ • Affect energy fitting experiment (poor energy resolution) • Note: CCQE BG processes also affect ne searches!

  7. Past Cross Section Uncertainty Table

  8. Future Cross Section Uncertainty Table

  9. Dec. 8, 2005 @FNAL PAC SciBooNE (P-954) ProposalK2K SciBar detector at FNAL Booster Neutrinos T. Nakaya (Kyoto) and M. Wascko (LSU)

  10. Collaboration Members • Barcelona • Colorado • Columbia • FNAL • ICRR • KEK • Kyoto • LANL • LSU • Rome • Valencia F. Sanchez, J. Alcaraz, S. Andringa, X. Espinal, G. Jover, T. Lux, F. Nova, A. Y. Rodriguez M. Wilking, E.D. Zimmerman J. Conrad, M. Shaevitz, K. B. M. Mahn, G. P. Zeller S. J. Brice, B.C. Brown, D. Finley, T. Kobilarcik, R. Stefanski Y. Hayato T. Ishii T. Nakaya, M. Yokoyama, H. Tanaka, K. Hiraide, Y. Kurimoto, K. Matsuoka, M. Taguchi, Y. Kurosawa W.C. Louis, R. Van de Water W. Metcalf, M. O. Wascko L. Ludovici, U. Dore, P. F. Loverre, C. Mariani J. J. Gomez-Cadenas, A. Cervera, M. Sorel, A. Tornero, J. Catala, P. Novella, E. Couce, J. Martin-Albo 11 institutes, 45 people (*) Potential Ph.D. thesis students, Institute representative

  11. Outline of this presentation (<40 pages) • Highlights (1page) • Introduction (8page) • Neutrino Physics • Neutrino Cross Sections • SciBooNE Experiment (10 page) • Physics Motivation • FNAL Booster Neutrinos • SciBar Detector • SciBooNE Physics (10page) • Anti-neutrinos • Neutrino Cross Sections for T2K • Measurements for MiniBooNE • Others • Logistics (5page) • Conclusion (1page)

  12. MiniBooNE beamline SciBar Decay region MiniBooNE Detector 50 m 100 m 1. Highlight • Anti-neutrinos • Unexplored object. • Non quasi-elastic n interactions • Precise knowledge on cross sections is necessary for T2K. • MiniBooNE near detector. • Confirmation and Redundancy for a mysterious (LSND) phenomena. T2K SciBar at BooNE Flux (normalized by area) K2K 1 2 En (GeV)

  13. n1 n2 n3 ne nm nt Dm223 Dm212 41.4m 39m 2. Introduction Super-K • Neutrino Oscillations (1998-2005) K2K Neutrino masses (Dm122, Dm232) Mixing Angles (q12, q23) q13➾ d SNO KamLAND

  14. T2K Next Step (2006-2015) ne n1 n2 nm n3 nt • Discover the last oscillation channel • q13 • CP violation in the lepton sector • d • Test of the standard n oscillation scenario (UMNS) • Precise measurements of n oscillations (Dm232, q23) NOnA Cross Mixing atmospheric solar

  15. HARP Fn(E) MIPP m n proton p Strategy of accelerator n oscillation experiments. Gigantic detector Intense beam oscillation p, p, p, p, K n, n, n, n protons s s s(E)Fnnear(E) ↔ s(E)Fnfar(E) MiniBooNE K2K-ND SciBooNE MINERnA

  16. Unexplored Area of Neutrino Physics sn in this E range interesting: • Data from old experiments (1970~1980) • Low statistics • Systematic Uncertainties • Nuclear effects • (p/p/n absorption/scattering, shadowing, low Q2 region) • Not well-modeled • New data from MiniBooNE • & K2K shedding light on this • More data at 1GeV with fine • grained resolution will • advance Neutrino Physics. QE DIS 1p MINOS, NuMI K2K, NOvA MiniBooNE, T2K, SciBooNE Super-K atmospheric n

  17. Recent K2K results on the neutrino cross sections. • Will be updated soon.

  18. Recent MiniBooNE results on the neutrino cross sections. • Will be updated soon.

  19. 3. SciBooNE Experiment K2K Data A fine-segmented tracking detector with an intense low energy neutrino beam. • SciBar Detector • Well-working detector (2003.9- at K2K) • Fine granularity (2.51.3cm2) and Fully-Active • PID capability • FNAL-BNB • An intense and low energy (~1GeV) beam. • ≤ 1 year data taking is sufficient. • Both neutrinos and anti-neutrinos. • The beam is well-understood from the CERN HARP measurements. An ideal marriage of the detector and the beam for a precision neutrino interaction experiment. (A new experimental team from K2K and MiniBooNE) ge+e- ge+e-

  20. Fermilab Accelerator Complex and BNB (Booster Neutrino Beam) NuMi is here We are here MiniBooNE is here SciBooNE will be here

  21. p-,K- p+,K+ p n n FNALBNB （2E20 protons for SciBooNE） Relative neutrino fluxes Beam Simulation Log scale nm From BNL-E910 nm ne p Be p+X Cross Section En(GeV) 6.7E20 POT/3 years 6 pbeam New HARP data are available soon. 3 0 • Directorate recommends planning on 1-2E20 POT/year

  22. D G F E C deep B H A An ideal location of the detector Expected nm flux s spectra At z=100m At ground level Same energy point Very low Energy statistics ~1/10 Several detector locations: A~H Here is BEST Far from the target

  23. Detector Component • SciBar Detector • From KEK, Japan • Electron Calorimeter • From KEK, Japan • European collaborators have the responsibility. • Muon Range Detector • Will be built at FNAL from the parts of an old experiment (FNAL-E6xx). • The material exists and the detailed design is on-going. MRD EC SciBar n beam

  24. n SciBar Detector • Extruded scintillators with WLS fiber readout • The scintillators are the neutrino target • 2.5 x 1.3 x 300 cm3 cell • ~15000 channels • Detect short tracks (>8cm) • Distinguish a proton from a pion by dE/dx • Total 15 tons • High track finding efficiency (>99%) • Clear identification of ν interaction process Extruded scintillator (15t) EM calorimeter 3m Multi-anode PMT (64 ch.) 3m 1.7m Wave-length shifting fiber Constructed in summer 2003

  25. SciBar Components 64 charge info. 2 timing info. VME board Top View Extruded Scintillator (1.3×2.5×300cm3) ・ made by FNAL (same as MINOS) Wave length shifting fiber (1.5mmΦ) ・ Long attenuation length (~350cm)  Light Yield : 18.9p.e./cm/MIP • Multi-Anode PMT • ・2×2mm2 pixel (3% cross talk @1.5mmΦ) • ・Gain Uniformity (20% RMS) • ・Good linearity (~200p.e. @6×105) • Readout electronics with VA/TA • ADC for all 14,400 channels • TDC for 450 sets (32 channels-OR)

  26. 262 cm n Beam 8 cm Readout Cell 4 cm Fibers Electron Catcher • “spaghetti” calorimeter re-used from CHORUS • 1mm diameter fibers in the grooves of lead foils • 4x4cm2 cell read out • from both ends • 2 planes (11X0) Horizontal: 30 modules Vertical : 32 modules • Expected resolution 14%√E • Linearity: better than 10%

  27. Event Display (K2K- Data) p 3track event CC-1p (m+p+p) candidate m ne CCQE candidate • The neutrino events are well observed with a fine resolution. proton CCQE candidate (n+nm+p) electron Large energy deposit in Electron Catcher

  28. MiniBooNE Cross Section Results

  29. MiniBooNE CCQEs on CH2 Momentum Transfer Muon Angle • Deficit of events at low Q2 • Corresponds to forward angle muons (good angular resolution) • Indicates some new physics?

  30. MiniBooNE CCQEs on CH2 Momentum Transfer Muon Angle • Shape at higher Q2 disagrees • Corresponds to large angle muons (good angular resolution) • Indicates higher MA?

  31. MiniBooNE CC1p+s on CH2 ( 10-36 cm2 ) • systematic errors due to n cross sections (~15%), • photon atten. and scatt. lengths in oil (~20%), • energy scale (~10%) • MiniBooNE result lower than NUANCE prediction • More consistent with ANL result than BNL result

  32. MiniBooNE CC1p+s on CH2 ( 10-36 cm2 ) • systematic errors due to n cross sections (~15%), • photon atten. and scatt. lengths in oil (~20%), • energy scale (~10%) • MiniBooNE result lower than Monte Carlo predictions • More consistent with ANL result than BNL result

  33. MiniBooNE NC1p0s on CH2 • systematic errors: • cross section uncertainties (~15%, 20%) • energy scale (5%) • MiniBooNE coherent fraction well below Rein-Sehgal and Marteau

  34. Conclusions from MB s results • Nuclear targets seem to have unpredicted effects on neutrino event kinematics • Cross sections (i.e., event rates) differ from predictions • Different rates of signal and BG events • Flavor BGs and n-interaction BGs • What other surprises are there??

  35. Booster Neutrino Beam

  36. 7. Physics of SciBar at BNB Comparison of nm flux spectra at K2K, T2K and BooNE • n run (Cross Section) • CC-1p cross section with MA. • CCQE MA measurement • NC p0 measurement • Search for CC coherent p • Search for NC coherent p0 • Search for the radiative Delta decay (n+Nm+N’+g) • Beam ne flux for MiniBooNE nmneappearance search • Fmsfor MiniBooNE nmnmdisappearance search Study n interaction to improve MC modeling of those interactions T2K Flux(normalized by area) SciBar at BooNE K2K En (GeV) 0 1 2

  37. Neutrino B.G. (~35%) • Anti-n run • CCQE measurement. • Negligible BG from n. • Energy Dependence s and MA can be measured • CC-1p cross section with MA. • NC p0 measurement • Also n+pn+p+p0 exclusive final-state search • Search for CC coherent p • Search for NC coherent p0 • Hyperon production in anti-n mode • n contamination for MiniBooNE anti-n measurements.

  38. Neutrino run (0.51020 POT) # of interactions in 10 ton Fiducial Volume nm~78,000 ne~ 700 cf. K2K-SciBar (0.21020 POT) : ~25,000 nm The well-developed analysis and MC simulation software in K2K are used for these studies. Further Improvements are also expected and promising.

  39. qm Pm Pm qm Pm qm Event Selection with MRD matching (Pm, qm) CC-QE CC-1p CC-coh. p CC-multi p 1 track ~13,500 events QE~67% 2 track QE ~1,970 events QE~76% 2 track non-QE ~2,360 events CC-1p~49%

  40. stat. only d(nQE/QE)= 5% d(nQE/QE)=20% CC-1p+ measurement • Physics motivation for T2K • Dominant background to nm disappearance in T2K • The uncertainty of nonQE/QE needs to be known to ~5% d(Dm2) d(sin2 2q) The nm disappearance measurement error (90%CL)

  41. p p m m Final state m,p,p m,n,p No pion (nucl. effect) m p p p p m CC-1p+ measurement (cont’d) SciBar has an ability to separate the final state En distribution for CC-1p+ Sensitive to the nuclear effect Clear event-by-event final-state tagging!

  42. Emitted p+ p+ efficiency CC-1p+ measurement (cont’d) p+ detection efficiency as a function of Pp+ • CC-1p+ signature: • 2-track, both are MIP-like Additional vertex activity can separate n+pm+p+p+ from n+nm+n+p+ Statistics will allow a 5% measurement

  43. - stat. only - dBG=10% - dBG=20% g sin2 2q13 sensitivity 10-2 p0 g 1 2 3 4 5 Exposure /(22.5kt x yr) NC-1p0 measurement • Physics motivation for T2K • Dominant background to ne appearance in T2K • Need to be known to 10% level 2-ring merged to 1-ring in Cherenkov detector 200~700MeV/c p0s

  44. Emitted p0 p0 efficiency NC-1p0 measurement (cont’d) p0 detection efficiency as a function of Pp0 NC-1p0 event display • Good efficiency for • high-momentum p0 • Reconstructed p0 • ~800events Additional vertex activity can separate n+pn+p+p0 from n+nn+n+p0 p0s are detected as two shower-like tracks in SciBar

  45. En distribution of NC-1p0 interaction Normalized by the entries up to 5GeV T2K neutrinos with a p0 fornebackground (afterneselection) SciBooNE neutrinos with ap0 K2K measurement

  46. NC-1p0 measurement (cont’d) s(n+pn+p+p0) Projected SciBar at K2K Projected SciBar at BooNE 10% measurement Map out energy dependence at point where cross section turns over

  47. Anti-neutrino run (1.51020 POT) # of interactions in FV nm ~40,000 nm ~22,000

  48. MRD matching sample (Pm, qm) w/ vertex activity cut 1 track qm CC-QE CC-1p CC-coh. p CC-multi p nm BG Pm ~9,300 events QE~80% nm BG=7% 2 track QE Pm qm ~910 events nm BG~80% 2 track non-QE Pm qm ~1,700 events nm BG~56% CC-1p~21% CC-coh. p~15%

  49. Reconstructed En n+pm++n n+nm-+p Anti-n QE: ~80% WS n BG: ~7% WS n CCQE: ~80% Can see the proton ➾ see neutrino background in anti-n beam

  50. CC-QE: nm + p m+ + n m+ (pm ,qm) nm n Anti-neutrino CCQE measurement • Physics motivation • The first anti-neutrino CCQE • s measurement below 1GeV • It is important for T2K phase-II No data • Detected as a 1-track event in SciBar • Can reconstruct neutrino energy

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