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Status of LBL Neutrino Experiments

Status of LBL Neutrino Experiments. Caren Hagner Universit ät Hamburg. SK atmospheric neutrinos, confirmation by K2K MINOS OPERA (Future: T2K and Nova). SuperKamiokande. Atmospheric Neutrino Results.

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Status of LBL Neutrino Experiments

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  1. Status of LBL Neutrino Experiments Caren Hagner Universität Hamburg • SK atmospheric neutrinos, confirmation by K2K • MINOS • OPERA • (Future: T2K and Nova) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  2. SuperKamiokande Atmospheric Neutrino Results L/E Analysis (PRL 93 (2004) 101801),Best Fit:sin22θ = 1.02 Δm2 = 2.4×10-3 eV2 Full SK-I data set, 90% CL (hep-ex/0501064): sin22θ > 0.92 1.5·10-3 eV2<Δm2<3.4·10-3 eV2 Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  3. SuperKamiokande • Analysis for vτ appearance:SK-I data setvτCC (≈ 63% DIS, Ev > 3.5 GeV) hadronic τ-decays (≈ 65%)Primary background:atm. v producing multiple π’s • Statistical discriminationof signal vs background:Likelihood & neural network techniques No tau appearance excluded @ 2.4σ “A Measurement of Atm. Neutrino Flux Consistent with Tau Neutrino Appearance”, PRL 97,171801 (2006) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  4. K2K no oscill oscill, best fit: sin2 2θ=1.0,Δm2=2.8·10-3eV2 "Measurement of Neutrino Oscillation by the K2K Experiment"The K2K collaboration, M. H. Ahn et al, hep-ex/0606032, Phys. Rev. D 74, 072003 (2006) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  5. MINOS Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  6. MINOS Detectors Far Detector Near Detector 5.4 ktons, 8830m484 steel/scintillator planes 1 kton, 4515m 282 steel, 153 scintillator planes Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  7. nm CC Event ne CC Event MINOS: Event Topologies NC Event UZ VZ 3.5m 1.8m 2.3m long m track+ hadronic activity at vertex short event, often diffuse short, with typical EM shower profile

  8. > 2.5 x 1020 pot 1.27 x 1020 pot Record intensity! 4 x 1013 pot/spill POT/Spill (x1012) Time MINOS-NuMi Beam 1st year result Year 2 Shutdown Special Runs Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  9. MINOS Results: Fit to Oscillation Hypothesis Measurement errors are 1σ, 1 DOF Fit constrained to sin2(2θ)≤1 (for 1.27·1020pot) "Observation of muon neutrino disappearance with the MINOS detectors in the NuMI neutrino beam," hep-ex/0607088Phys. Rev. Lett. 97, 191801 (2006) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  10. Fit includes penalty terms for three main systematic uncertainties Fit is constrained to physical region: sin2(2θ23)≤1 MINOS: Allowed Regions Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  11. MINOS: Future Sensitivity Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  12. Low Multiplicity High Multiplicity MINOS – Future Prospects • Compare Near/Far NC energy spectrum. Sensitive to νμ→νsterile, ν decay. • First: Understand NC spectrum in near detector. • NC events prone to intensity related reco issues • Study spills with a lot of events, and spills with fewer events Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  13. MINOS: Neutrino Time of Flight Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  14. OPERA FIRST BEAM in August 2006 LNGS 732 km (2.44ms) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  15. OPERA: CNGS beam 400GeV p on graphite target 4.5·1019pot/year Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  16. τ- vτ τ-decay: W p,n hadrons 1 mm t- μ- nτ Hadrons Lead Emulsions OPERA: Detection of vτ Typical topology of τ-decay:“Kink” within 1mm from vertex Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  17. OPERA Target: Lead/Emulsion Bricks 10X0 8kg Lead/Emulsion Brick(total ≈ 200000) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  18. Supermodule 1 Supermodule 2 OPERA - Detector Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  19. Target Region:- Target Tracker (Scintillator) - Lead/Emulsion Bricks (100.000 per Supermodule) OPERA - Detector Supermodule 1 Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  20. μ v X B B Magnet-Region:Iron &RPC Planes Precision Tracker:6 Planes of Drifttubes OPERA - Detector Supermodule 1 Target Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  21.  decay channel Signal Background Δm2 = 2.4·10-3 eV2 Δm2 = 3.0·10-3 eV2  µ 3.6 5.6 0.23  e 4.3 6.7 0.23  h 3.8 5.9 0.32  3h 1.1 1.7 0.22 ALL 12.8 19.9 1.0 OPERA: Expected Signal full mixing, 5 years run @ 4.5x1019 p.o.t. / year Event rates (~1.7 Kton, 4.5·1019 pot/year) ~ 6200 events/year (CC+NC) ~ 30 events/day (CC+NC) ~ 25 vτ CC events/year (for Δm2 =2.4·10-3eV2) Main background sources: - charm production and decays - hadron re-interactions in lead - large-angle μ scattering in lead Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  22. OPERA – Physics Potential Minos 90% CL 4σ discovery probability % Δm2 in 10-2 eV2 Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  23. suction cup vehicle OPERA – Brick Manipulating System Loading Station Robot to insert/extract bricks Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  24. BAM at LNGS OPERA – Brick Assembly Machine • Lead/Emulsion bricks are assembled underground in GS • Darkroom • 5 robotized parallel stations Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  25. OPERA: Brick Filling • Opera brick filling started • Must improve speed of BAM,BMS, coordination lead production-BAM-BMS. • O(2000) bricks inserted • All bricks inserted:March 2008 But, at the moment: Only 75% of emulsion films funded Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  26. Pot vs Time Ev. vs Time OPERA: First CNGS Beam • Run August 2006:7.6·1017pot (1.7·1013pot/extraction, 70% of nominal intensity)319 events in time with beam (300 expected) • Run October 2006:0.6·1017pot (1.2·1013pot/extraction)stopped because of water leak in reflector • Electronic Detectors only (No lead/emulsion bricks) August 2006 August 2006 Opera Coll., New J. Phys. 8 (2006) 303 Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  27. OPERA: Origin of Beam Events Spectrometer 1 Spectrometer 2 Target1 Target2 68 % 5 % 11% 7.5% 1 % 0.3 % rock muons 0.6 % 1 % uncertain : 8.5 % Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  28. Direction of CNGS neutrino beam 3.5o Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  29. CNGS beam direction measurement μzenith angle y qy >0 z qy <0 August Run result: <> = 3.4 ± 0.3 degrees Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  30. CNGS beam timing measurement Event selection via GPS timing information 10.5 μs 10.5 μs 50 ms Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  31. OPERA CNGS beam events vCC in rock (rock muon) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  32. OPERA: real event vCC in target tracker Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  33. OPERA vCC in Magnet Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  34. OPERA vNC candidate Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  35. OPERA μ bundle (cosmics) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  36. prelim. - CNGS August Run: μ momentum RPC’s in magnet region (Here: only RPC’swill improve with drifttubes) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  37. Normalization Check: vμCC in Magnet • Trigger + On Time + μ Id (> 10 RPC plane) + vertex in magnet OR first 2 TT + fid. Vol. • no χ2 cut on μ track August + October: Data = 36 ± 6 MC = 29.9 October only: Data = 1 MC = 2.2 vert. angle (rad) • vCC in magnets selection efficiency 52% • very pure sample, NC contamination 4% (1,1 event) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  38. 10 m 1 m Changeable sheets changeable cheet doublet(CS)  1st emulsion sheet brick 2nd emulsion sheet Brick 100 m Target Tracker Connection CS – Target Tracker Angular difference betw. prediction/found track <10 mrad (dominated by electronic detector resolution) Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  39. OPERA Future Plans CNGS: • CNGS Beam in 2007:repairs at horn/reflectorbeam in september/october possible (1.2-1.6·1019pot/day) • CNGS Beam in 2008:4.09·1019pot (extraction intensity 4.4·1013pot) • Multi turn extraction scheme (virtually loss less) Detector: Brick filling started, ready for next phase: Waiting for first neutrino interaction in emulsions… Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  40. End Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  41. Leaking Drain Connection Outer conductor (Al) Ceramic insulator (500V) (brazed to the Ti joints) Clamps for vapor tightness Titanium joints Rupture point – leak!! Bellows to give (some) flexibility Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

  42. Radial beam profile at Gran Sasso Caren Hagner – LAUNCH Workshop Heidelberg 23.3.2007

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