caren hagner csts saclay 10.03.2004 present and near future of θ 13 & cpv in neutrino...
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Caren Hagner CSTS Saclay 10.03.2004
Present And Near Future of θ13 & CPV
in Neutrino Experiments
Present And Near Future of θ13 & 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
Caren Hagner CSTS Saclay 10.03.2004
Neutrino MixingNeutrino Mixing
3
2
1
321
321
321
UUU
UUU
UUU eeee
3
2
1
1212
1212
1313
1313
2323
2323
100
0
0
0
010
0
0
0
001
cs
sc
ces
esc
cs
sci
ie
232
3132
2313
2
133
||1||42sin
||sin
sin
ee
e
ie
UU
U
eU
232
3132
2313
2
133
||1||42sin
||sin
sin
ee
e
ie
UU
U
eU
θ23
solar, Kamland atmospheric, K2K
θ13, δ ??
θ12
CHOOZ
Caren Hagner CSTS Saclay 10.03.2004
Neutrino Oscillations: Vacuum (2 Flavors)
Neutrino Oscillations: Vacuum (2 Flavors)
2
1
cossin
sincos
e
21
22
221 mmm 2
122
221 mmm
Survival probability:
0 1 2 3 L in Losz
Caren Hagner CSTS Saclay 10.03.2004
Neutrino Parameters: Global Fits
Neutrino Parameters: Global Fits
Parameter Best-fit value Range (3σ)
Δm221 6.9 × 10-5 eV2 (5.4 ÷ 9.5) × 10-5 eV2
|Δm231| 2.6 × 10-3 eV2 (1.5 ÷ 3.7) × 10-3 eV2
θ12 (sin2 θ12) 33.2o (0.30) 28.6o ÷ 38.6o
θ23 (sin2 θ23) 46.1o (0.52) 33.8o ÷ 58.1o
θ13 (sin2 θ13) 4.4o (0.006) 0o ÷ 13.4o (< 0.054)
δCP - 0 ÷ 2π
Parameter Best-fit value Range (3σ)
Δm221 6.9 × 10-5 eV2 (5.4 ÷ 9.5) × 10-5 eV2
|Δm231| 2.6 × 10-3 eV2 (1.5 ÷ 3.7) × 10-3 eV2
θ12 (sin2 θ12) 33.2o (0.30) 28.6o ÷ 38.6o
θ23 (sin2 θ23) 46.1o (0.52) 33.8o ÷ 58.1o
θ13 (sin2 θ13) 4.4o (0.006) 0o ÷ 13.4o (< 0.054)
δCP - 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 Δm2atm= 2 × 10-3 eV2 they obtain at 90%C.L. (3σ):
sin2 θ13 ≤ 0.035 (0.066) sin2 2θ13 ≤ 0.14 (0.25)
Fixing Δm2atm= 2 × 10-3 eV2 they obtain at 90%C.L. (3σ):
sin2 θ13 ≤ 0.035 (0.066) sin2 2θ13 ≤ 0.14 (0.25)
Caren Hagner CSTS Saclay 10.03.2004
e e (disappearance experiment)
Pth= 8.5 GWth, L = 1,1 km, M = 5toverburden: 300 mwe
R = 1.01 2.8%(stat)2.7%(syst)R = 1.01 2.8%(stat)2.7%(syst)
M. Apollonio et. al., Eur.Phys.J. C27 (2003) 331-374
CHOOZCHOOZ
@m2atm=2×10-3 eV2
sin22θ13 < 0.2
(90% C.L)
@m2atm=2×10-3 eV2
sin22θ13 < 0.2
(90% C.L)
Caren Hagner CSTS Saclay 10.03.2004
SK: Evidence For Oscillation Pattern
SK: Evidence For Oscillation Pattern
Select events with high resolution in L/ESelect events with high resolution in L/E
from Noon2004
New!
Caren Hagner CSTS Saclay 10.03.2004
SK: Events with high L/E resolution
SK: Events with high L/E resolution
At 90% CL:
Δm2 = (1.9 ÷ 3.0) × 10-3 eV2 sin22θ ≥ 0.9
At 90% CL:
Δm2 = (1.9 ÷ 3.0) × 10-3 eV2 sin22θ ≥ 0.9
Caren Hagner CSTS Saclay 10.03.2004
3 Flavor Transition Probabilities
3 Flavor Transition Probabilities
with
Reactor experimentsReactor experiments
Δ (α)
(anti-v)
LBL neutrino beamsLBL neutrino beams(In vacuum, on atmospheric osc. scale)(In vacuum, on atmospheric osc. scale)
precision on θ23 and Δm231
θ13 , δCP, mass hierarchybut degeneracies & correlations!
clean measurement of θ13
from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068
Caren Hagner CSTS Saclay 10.03.2004
Overview: Experiments Overview: Experiments
Caren Hagner CSTS Saclay 10.03.2004
CNGS Neutrino BeamCNGS Neutrino BeamCern to Gran Sasso: 730km, <Ev> = 17GeVCern to Gran Sasso: 730km, <Ev> = 17GeV
Possible channels:
vμ → vT appearance
vμ → vμ disappearance
vμ → ve appearance
Possible channels:
vμ → vT appearance
vμ → vμ disappearance
vμ → ve appearance
sin22θ13
Caren Hagner CSTS Saclay 10.03.2004
OPERAOPERA
Main goal: search for vT appearance:full mixing, 5 years run at 4.5 × 1019 pot/year
Main goal: search for vT appearance:full mixing, 5 years run at 4.5 × 1019 pot/year
target mass: 1.77 ktonstarget mass: 1.77 ktons
1.8 kton 7.3 11.4 0.7
Caren Hagner CSTS Saclay 10.03.2004
OPERA: Sensitivity to θ13OPERA: Sensitivity to θ13
0.06 or 7o
Fitting simultaneouslyEe, miss. pT, Evis
Fitting simultaneouslyEe, miss. pT, Evis
method: ve appearance in vμ beam (εe = 0.7) background: e from τ decay, ve beam contamination, vμCC events with missing muon (+ another track mimicking e),
vμNC events with neutral pions
method: ve appearance in vμ beam (εe = 0.7) background: e from τ decay, ve beam contamination, vμCC events with missing muon (+ another track mimicking e),
vμNC events with neutral pions
Caren Hagner CSTS Saclay 10.03.2004
OPERA: Time ScheduleOPERA: 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
Caren Hagner CSTS Saclay 10.03.2004
MINOSMINOS
Initial conditions:LE option → below τ threshold (3.1GeV)2.5×1020 pot/year
Initial conditions:LE option → below τ threshold (3.1GeV)2.5×1020 pot/year
New request to Fermilab: 25×1020 pot in 5 yearsNew request to Fermilab: 25×1020 pot in 5 years
Caren Hagner CSTS Saclay 10.03.2004
MINOS: How to measure θ13
MINOS: How to measure θ13
+ near detector+ near detector
far detector at Soudan Mine:steel & scintillator calorimetertarget mass: 5.4 ktons
far detector at Soudan Mine:steel & scintillator calorimetertarget mass: 5.4 ktons
signal: ve appearance in vμ beam (εe = 0.28)
background: e from τ decay (after vμ → vτ), ve beam contamination (~ 1%),
vμCC events with missing muon (+ another track mimicking e), vμNC events with neutral pions
signal: ve appearance in vμ beam (εe = 0.28)
background: e from τ decay (after vμ → vτ), ve beam contamination (~ 1%),
vμCC events with missing muon (+ another track mimicking e), vμNC events with neutral pions
Caren Hagner CSTS Saclay 10.03.2004
MINOS: Time ScheduleMINOS: Time Schedule
• far detector completed in 2003now taking atmospheric neutrino data
• near detector installation starts now
• beam commissioning starts Dec. 2004
• physics running starts in April 2005
• goal in first year: 2.5×1020 pot
Caren Hagner CSTS Saclay 10.03.2004
Comparison MINOS, ICARUS, OPERA
Comparison MINOS, ICARUS, OPERA
from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068
Caren Hagner CSTS Saclay 10.03.2004
Comparison MINOS, ICARUS, OPERA
Comparison MINOS, ICARUS, OPERA
from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068
Caren Hagner CSTS Saclay 10.03.2004
… comparision continued… comparision continued
from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068
After 5 years running (90% C.L.)After 5 years running (90% C.L.)
all combined:sin22θ13 ≤ 0.06 (90%CL)all combined:sin22θ13 ≤ 0.06 (90%CL)
Caren Hagner CSTS Saclay 10.03.2004
J-PARC Neutrino Facility 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: 1,2,3o
tuned to osc.maximum
T2K: T2K:
→
T2K: Sensitivity to θ13T2K: Sensitivity to θ13
→
Caren Hagner CSTS Saclay 10.03.2004
Numi Off-Axis ExperimentNumi Off-Axis Experiment(L = 820km)
Off-axis beamneutrino energy
Caren Hagner CSTS Saclay 10.03.2004
NUMI Off-Axis: DetectorsNUMI Off-Axis: Detectors• on the surface• target mass ~ 50ktons• active material: scintillator or RPC• passive material: particle board
RPC detectorScintillator detectorScintillator detector
Caren Hagner CSTS Saclay 10.03.2004
NUMI Off-Axis: Identification of ve
NUMI Off-Axis: Identification of veve event
vμ event
Caren Hagner CSTS Saclay 10.03.2004
NUMI Off-Axis: Identification of ve
NUMI Off-Axis: Identification of ve
Caren Hagner CSTS Saclay 10.03.2004
NUMI Off-Axis: Sensitivity to θ13
NUMI Off-Axis: Sensitivity to θ13
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
Caren Hagner CSTS Saclay 10.03.2004
Reactor Neutrino Experiments For θ13
Reactor Neutrino Experiments For θ13
• 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 errorIdea: similar to CHOOZ reactor experiment, but use near and far detector to reduce systematic error
Caren Hagner CSTS Saclay 10.03.2004
Nuclear reactor1,2 core(s) ON/OFF : ok 4 cores ON/OFF : no !
Nuclear reactor1,2 core(s) ON/OFF : ok 4 cores ON/OFF : no !
Near detector5-30 tons> 50 mwe
Near detector5-30 tons> 50 mwe
Far detector5-30 tons
> 200 mwe
Far detector5-30 tons
> 200 mwe
D1 = 0-1 kmD2 = 1-2 km
e e,,
Isotrope e flux (uranium & plutonium fission fragments) Detection tag : e + p e+ + n, <E>~ 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
Reactor Neutrino Experiments: Method
near atm. oscill. maximumnear atm. oscill. maximum
Caren Hagner CSTS Saclay 10.03.2004
Reactor Experiments: Sites
Reactor Experiments: Sites
Caren Hagner CSTS Saclay 10.03.2004
Japan: KASKAJapan: KASKA
Worlds most powerfulnuclear plant!Pth = 24.3GW
but: 7 reactors
Worlds most powerfulnuclear plant!Pth = 24.3GW
but: 7 reactors
Caren Hagner CSTS Saclay 10.03.2004
KASKA and KAMLANDKASKA and KAMLAND
Now asking for detector R&D moneysuccessful negotiations for sitenegotiating with reactor safety office
? Start construction 2006? Start data taking 2008
Now asking for detector R&D moneysuccessful negotiations for sitenegotiating with reactor safety office
? Start construction 2006? Start data taking 2008
US: Diablo CanyonUS: Diablo Canyon
Diablo Canyon: Movable Detectors
Diablo Canyon: Movable Detectors
Caren Hagner CSTS Saclay 10.03.2004
Reactor Experiments: Sensitivity to θ13
Reactor Experiments: Sensitivity to θ13
reactor experimentof D - CHOOZ size:sin22θ13 ≤ 0.032 (90%CL)
reactor experimentof D - CHOOZ size:sin22θ13 ≤ 0.032 (90%CL)
at 90% CLat 90% CL
from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068
Caren Hagner CSTS Saclay 10.03.2004
What can we learn about δ?
What can we learn about δ?
Complementarity of accelerator and reactor experiments is very important!
Caren Hagner CSTS Saclay 10.03.2004
Concluding OverviewConcluding Overview
from Huber, Lindner, Rolinec, Schwetz, Winter hep-ph/0403068
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