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Caren Hagner CSTS Saclay 10.03.2004 Present And Near Future of θ 13 & CPV in Neutrino Experiments Caren Hagner Universität Hamburg Neutrino Mixing and.

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Presentation on theme: "Caren Hagner CSTS Saclay 10.03.2004 Present And Near Future of θ 13 & CPV in Neutrino Experiments Caren Hagner Universität Hamburg Neutrino Mixing and."— Presentation transcript:

1 Caren Hagner CSTS Saclay 10.03.2004 Present And Near Future of θ 13 & CPV in Neutrino Experiments Caren Hagner Universität Hamburg Neutrino Mixing and Oscillation Probabilities LBL Accelerator Experiments –under construction: Opera, Icarus, Minos –next generation: T2K, NUMI Off-Axis Reactor Experiments Conclusion

2 Caren Hagner CSTS Saclay 10.03.2004 Neutrino Mixing θ 23 solar, Kamland atmospheric, K2K θ 13, δ ?? θ 12 CHOOZ

3 Caren Hagner CSTS Saclay 10.03.2004 Neutrino Oscillations: Vacuum (2 Flavors) Survival probability: 0 1 2 3 L in L osz

4 Caren Hagner CSTS Saclay 10.03.2004 Neutrino Parameters: Global Fits ParameterBest-fit value Range (3σ) Δm 2 21 6.9 × 10 -5 eV 2 (5.4 ÷ 9.5) × 10 -5 eV 2 |Δm 2 31 | 2.6 × 10 -3 eV 2 (1.5 ÷ 3.7) × 10 -3 eV 2 θ 12 (sin 2 θ 12 ) 33.2 o (0.30) 28.6 o ÷ 38.6 o θ 23 (sin 2 θ 23 ) 46.1 o (0.52) 33.8 o ÷ 58.1 o θ 13 (sin 2 θ 13 ) 4.4 o (0.006) 0 o ÷ 13.4 o (< 0.054) δ CP - 0 ÷ 2π ParameterBest-fit value Range (3σ) Δm 2 21 6.9 × 10 -5 eV 2 (5.4 ÷ 9.5) × 10 -5 eV 2 |Δm 2 31 | 2.6 × 10 -3 eV 2 (1.5 ÷ 3.7) × 10 -3 eV 2 θ 12 (sin 2 θ 12 ) 33.2 o (0.30) 28.6 o ÷ 38.6 o θ 23 (sin 2 θ 23 ) 46.1 o (0.52) 33.8 o ÷ 58.1 o θ 13 (sin 2 θ 13 ) 4.4 o (0.006) 0 o ÷ 13.4 o (< 0.054) δ CP - 0 ÷ 2π Global fit including solar, atmospheric, reactor (Kamland and CHOOZ) and accelerator (K2K) data. M. Maltoni, T.Schwetz, A.M.Tortola, J.W.F.Valle, Phys. Rev. D68 (2003) 113010, hep-ph/0309130. Global fit including solar, atmospheric, reactor (Kamland and CHOOZ) and accelerator (K2K) data. M. Maltoni, T.Schwetz, A.M.Tortola, J.W.F.Valle, Phys. Rev. D68 (2003) 113010, hep-ph/0309130. Fixing Δm 2 atm = 2 × 10 -3 eV 2 they obtain at 90%C.L. (3σ): sin 2 θ 13 ≤ 0.035 (0.066) sin 2 2θ 13 ≤ 0.14 (0.25)

5 Caren Hagner CSTS Saclay 10.03.2004 e  e (disappearance experiment) P th = 8.5 GW th, L = 1,1 km, M = 5t overburden: 300 mwe R = 1.01  2.8%(stat)  2.7%(syst) M. Apollonio et. al., Eur.Phys.J. C27 (2003) 331-374 CHOOZ @  m 2 atm =2×10 -3 eV 2 sin 2 2θ 13 < 0.2 (90% C.L) @  m 2 atm =2×10 -3 eV 2 sin 2 2θ 13 < 0.2 (90% C.L)

6 Caren Hagner CSTS Saclay 10.03.2004 SK: Evidence For Oscillation Pattern Select events with high resolution in L/E from Noon2004 New!

7 Caren Hagner CSTS Saclay 10.03.2004 SK: Events with high L/E resolution At 90% CL: Δ m 2 = (1.9 ÷ 3.0) × 10 -3 eV 2 sin 2 2θ ≥ 0.9 At 90% CL: Δ m 2 = (1.9 ÷ 3.0) × 10 -3 eV 2 sin 2 2θ ≥ 0.9

8 Caren Hagner CSTS Saclay 10.03.2004 3 Flavor Transition Probabilities with Reactor experiments Δ (α)(α) (anti-v) LBL neutrino beams (In vacuum, on atmospheric osc. scale) precision on θ 23 and Δm 2 31 θ 13, δ CP, mass hierarchy but degeneracies & correlations! clean measurement of θ 13 from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068

9 Caren Hagner CSTS Saclay 10.03.2004 Overview: Experiments

10 Caren Hagner CSTS Saclay 10.03.2004 CNGS Neutrino Beam Cern to Gran Sasso: 730km, = 17GeV Possible channels: v μ → v T appearance v μ → v μ disappearance v μ → v e appearance Possible channels: v μ → v T appearance v μ → v μ disappearance v μ → v e appearance sin 2 2θ 13

11 Caren Hagner CSTS Saclay 10.03.2004 OPERA Main goal: search for v T appearance: full mixing, 5 years run at 4.5 × 10 19 pot/year target mass: 1.77 ktons 1.8 kton 7.3 11.4 0.7

12 Caren Hagner CSTS Saclay 10.03.2004 OPERA: Sensitivity to θ 13 0.06 or 7 o Fitting simultaneously E e, miss. p T, E vis method: v e appearance in v μ beam (ε e = 0.7) background: e from τ decay, v e beam contamination, v μ CC events with missing muon (+ another track mimicking e), v μ NC events with neutral pions

13 Caren Hagner CSTS Saclay 10.03.2004 OPERA: Time Schedule Nov 2003: SM1 magnet RPC installation (ok) Sep 2004: SM1 target installation Jan 2005: BAM and BMS installation July 2005: start filling bricks May 2006: start neutrino beam

14 Caren Hagner CSTS Saclay 10.03.2004 MINOS Initial conditions: LE option → below τ threshold (3.1GeV) 2.5×10 20 pot/year New request to Fermilab: 25×10 20 pot in 5 years

15 Caren Hagner CSTS Saclay 10.03.2004 MINOS: How to measure θ 13 + near detector far detector at Soudan Mine: steel & scintillator calorimeter target mass: 5.4 ktons signal: v e appearance in v μ beam (ε e = 0.28) background: e from τ decay (after v μ → v τ ), v e beam contamination (~ 1%), v μ CC events with missing muon (+ another track mimicking e), v μ NC events with neutral pions signal: v e appearance in v μ beam (ε e = 0.28) background: e from τ decay (after v μ → v τ ), v e beam contamination (~ 1%), v μ CC events with missing muon (+ another track mimicking e), v μ NC events with neutral pions

16 Caren Hagner CSTS Saclay 10.03.2004 MINOS: Time Schedule far detector completed in 2003 now taking atmospheric neutrino data near detector installation starts now beam commissioning starts Dec. 2004 physics running starts in April 2005 goal in first year: 2.5×10 20 pot

17 Caren Hagner CSTS Saclay 10.03.2004 Comparison MINOS, ICARUS, OPERA from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068

18 Caren Hagner CSTS Saclay 10.03.2004 Comparison MINOS, ICARUS, OPERA from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068

19 Caren Hagner CSTS Saclay 10.03.2004 … comparision continued from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068 After 5 years running (90% C.L.) all combined: sin 2 2θ 13 ≤ 0.06 (90%CL)

20

21 Caren Hagner CSTS Saclay 10.03.2004 J-PARC Neutrino Facility approved on Dec.20 2004 construction from 2004-2008 (JFY) beam line and near detector @ 280m (without 2km detector) start experiment in 2009 approved on Dec.20 2004 construction from 2004-2008 (JFY) beam line and near detector @ 280m (without 2km detector) start experiment in 2009 Off-axis beam: 1,2,3 o tuned to osc.maximum

22 T2K: →

23 T2K: Sensitivity to θ 13 →

24 Caren Hagner CSTS Saclay 10.03.2004 Numi Off-Axis Experiment (L = 820km) Off-axis beam neutrino energy

25 Caren Hagner CSTS Saclay 10.03.2004 NUMI Off-Axis: Detectors on the surface target mass ~ 50ktons active material: scintillator or RPC passive material: particle board RPC detector Scintillator detector

26 Caren Hagner CSTS Saclay 10.03.2004 NUMI Off-Axis: Identification of v e v e event v μ event

27 Caren Hagner CSTS Saclay 10.03.2004 NUMI Off-Axis: Identification of v e

28 Caren Hagner CSTS Saclay 10.03.2004 NUMI Off-Axis: Sensitivity to θ 13 Time Schedule: R&D proposal submitted full proposal in march04 start construction Oct06 data taking with 25% of detector in 2008 Time Schedule: R&D proposal submitted full proposal in march04 start construction Oct06 data taking with 25% of detector in 2008

29 Caren Hagner CSTS Saclay 10.03.2004 Reactor Neutrino Experiments For θ 13 Europe: Double CHOOZ US: Diablo Canyon, Braidwood, China, Brazil Japan: KASKA Idea: similar to CHOOZ reactor experiment, but use near and far detector to reduce systematic error

30 Caren Hagner CSTS Saclay 10.03.2004 Nuclear reactor 1,2 core(s)  ON/OFF : ok  4 cores  ON/OFF : no ! Nuclear reactor 1,2 core(s)  ON/OFF : ok  4 cores  ON/OFF : no ! Near detector 5-30 tons > 50 mwe Near detector 5-30 tons > 50 mwe Far detector 5-30 tons > 200 mwe Far detector 5-30 tons > 200 mwe D 1 = 0-1 km D 2 = 1-2 km e e, ,  Isotrope e flux (uranium & plutonium fission fragments) Detection tag : e + p  e + + n, ~ 4 MeV, Threshold ~1.8 MeV Disappearance experiment: suppression+shape distorsion between the 2 detectors 2 IDENTICAL detectors (CHOOZ, KamLAND, BOREXINO/CTF type) Minimise the uncertainties on reactor flux & spectrum (2 % in CHOOZ) Cancel cross section uncertainty (1.9 %) Challenge: relative normalisation between the two detectors < 1% ! Reactor Neutrino Experiments: Method near atm. oscill. maximum

31 Caren Hagner CSTS Saclay 10.03.2004 Reactor Experiments: Sites

32 Caren Hagner CSTS Saclay 10.03.2004 Japan: KASKA Worlds most powerful nuclear plant! P th = 24.3GW but: 7 reactors

33 Caren Hagner CSTS Saclay 10.03.2004 KASKA and KAMLAND Now asking for detector R&D money successful negotiations for site negotiating with reactor safety office ? Start construction 2006 ? Start data taking 2008 Now asking for detector R&D money successful negotiations for site negotiating with reactor safety office ? Start construction 2006 ? Start data taking 2008

34 US: Diablo Canyon

35 Diablo Canyon: Movable Detectors

36 Caren Hagner CSTS Saclay 10.03.2004 Reactor Experiments: Sensitivity to θ 13 reactor experiment of D - CHOOZ size: sin 2 2θ 13 ≤ 0.032 (90%CL) at 90% CL from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068

37 Caren Hagner CSTS Saclay 10.03.2004 What can we learn about δ? Complementarity of accelerator and reactor experiments is very important!

38 Caren Hagner CSTS Saclay 10.03.2004 Concluding Overview from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068

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