05/09/2009
* DoubleChooz, RENO, Dayabay *
ν ν "(# e + p $ e + + n) ν ν ν ν are produced in β-decays of fission products. ~ 6!10 20 " e / s / reactor ν E " ~ 4 +4 #2 MeV 090314 F.Suekane, TIPP09 3
( ) $ 1% sin 2 2& 13 sin 2 'm 13 P " e # " e 2 L 4E % cos4 & 13 sin 2 2& 12 sin 2 'm 12 4E Reactor Neutrino Oscillation 2 L 1.2 1 sin 2 2θ 13 0.8 P(!e -->!e ) 0.6 0.4 0.2 Normal Hierarchy Inverted Hierarchy sin 2 2θ 13 =0.1 assumed ~sin 2 2θ 12 0 1 10 100 1000 DC, DB, RENO L(km) KamLAND
sin 2 2θ 13 upper limit CHOOZ reactor (ν e --> ν e ) experiment L=1km D=300mwe sin 2 2θ 13 <0.15 @Δm 2 =2.5x10-3 ev 2
CHOOZ sin 2 2" 13 ~ 0.2 Reactor Near Detector (N N ) Far Detector (N F ) L N L F ~1.5km Use near and far detector of identical structure to cancel systemaic uncertainties of ν flux and detector response.
Reactor-θ 13 Site Map >2007 RENO Double Chooz Daya Bay
Double Chooz Experiment to detect the 3rd ν Oscillation using reactor ν. 0.4km 1.05km P=8.4GWth 08.03.25 suekane @ JPS 8
2004-2007: Detector Design Calibration Glove-Box : Outer Veto : Scintillator panels Target ν : LS; 80% C 12 H 26 + 20% PXE +0,1% Gd + PPO + Bis-MSB 10,3 m 3 γ Catcher : LS; 80% C 12 H 26 + 20% PXE + PPO + Bis-MSB 22,6 m 3 Non scintillating Buffer : mineral oil 114 m 3 7 m Buffer vessel & 390 10 PMTs : Stainless steel 3 mm Inner Muon Veto : mineral oil + 70 8 PMTs 90 m 3 Steel Shielding : 17 cm steel, All around 7 m
ν e event selection Δt " E! ~ 8MeV e + ΔT n E=1~8MeV e + E=8MeV n τ~30µs E vis E vis - Only 3 main cuts. => small room for systematic uncertainty - Detection Efficiency is insensitive to the cut parameters
Sensitivity in Time sin 2 2θ 13 limit σ sys =0.6% Far+Near Detectors σ sys =2.6% Far Detector only 5 x better than current limit 2010 2011 2012 2013 2014
DC, Dayabay, RENO Double Chooz Daya Bay RENO Double Chooz Dayabay RENO Power(GWth) 8.2GW 11.6GWth (17.4GW>2012) 16.1GW Detector(ton) 8 80 16 Baseline(km) 1.05 1.8 1.4 sin 2 2θ 13 Sensitivity ~0.03 ~0.01 ~0.02
ν-detector Double Chooz Daya Bay RENO M=8ton N=1+1 M=20ton N=2+2+4 M=16ton N=1+1
Double Chooz Status DOUBLE CHOOZ suekane @ far IPMU detector FW 14
Veto PMT Installed. (2009.2) Detector Tank is ready. (2008.
6/2009 Botton & Side PMT (330) installation finished (under Japanese leadership)
9/2009 Acrylic Vessels being installed 12/ Electronics installation 1/2010 Scintillator filling 4/2010 Commissioning
Staus of Slides: from Courtesy of Prof. Kam_Biu Luk & Prof. Karsten Heeger (2009.3)
Civil Construction Inside tunnel Stainless steel tank in China 4-m vessel in the U.S.
Daya Bay: Milestones (by Kam Bieu ) Daya Bay is fully funded. Civil and detector construction is well on the way. Beneficial occupancy of Surface Assembly Building March 2009 Assembly of first two ADs in SAB Summer 2009 Data-taking in Near Halls Summer 2010 Data-taking with all eight detectors Summer 2011
Current Status of RENO Slides: Courtesy of Prof. Soo Bong Kim 2009.3
RENO Near and Far Tunnels are ready No Detector Photos
Summary of Construction Status (by Soo Bong Kim)
Summary of DC, DB, RN 2009 2012 2010 2011 2013 2014 DoubleChooz DayaBay RENO Far Near Far Near Far Near DC, Dayabay and RENO finally start data taking within a year.
(1) sin 2 2θ 13 (2)Mass Hierarchy (3)θ 23 (4) CP δ (1) ν µ =>ν e (2) ν µ =>ν e (3) Matter effect baseline (4) ν e =>ν e
E-L Relation of Oscillation Experiments Up to now Future Reactor Prospect Opera Reactor (2~8MeV) Accelerator LSND Bugey Goesgen MiniBooNE PaloVerde CHOOZ DChooz K2K MINOS NOVA T2K KamLAND DayaBay RENO 080520 F.Suekane@PMN08 26
Very precise θ13 KamLAND Reactor Neutrino Oscillation 1.2 sin22θ13=0.1 assumed P(!e -->!e ) 1 0.8 0.6 0.4 Normal Hierarchy 0.2 Inverted Hierarchy 0 1 10 100 1000 L(km) Δm213 080520 Very precise θ12 Mass Hierarchy F.Suekane@PMN08 27
Physics @ 1 st Δm 2 13 Maximum (L~1.5km) = Very Precise θ 13 P.Hauber et al. hrp-ph/0303232 RENO DC DB KamLAND- @ Distortion normalization => δsin 2 2θ 13 <0.01
Target 8 210 ton Arxive hep-ph/0601266v1
Complementarity of Reactor-accelerator θ 13 measurement θ 23 degeneracy 0.50 ± 0.11 (" µ # " e ) = ( 1! 0.00017L[ km] ) 2 sin2 2$ 13 ± 0.045sin2$ 13 sin% Matter effect P AC δ dependece L=300km Yasuda Accelerator Measurement Reactor Measurement 080520 30
θ 23 Accelerator 4MW*0.54Mt 2+6years Reactor: 100t*4.2y@ 24GW
Quick Access to δ CP δ CP =-π/2 δ CP =0 δ CP =π/2 δsin 2 2θ 13 =0.005 θ 23 degeneracy Mass Hierarchy θ 13 ν sinδ
non-0 δ 100 4.2year@ 1000 4.2year@ H.Sugiyama hep-ph/0411209v1 sin 2 2θ 13 >0.05
Physics @ 1 st Δm 2 12 Maximum(L~50km) = Very Precise θ 12 & Mass Hierarchy 50km Reactor Neutrino Oscillation 1.2 1 P(!e -->!e ) 0.8 0.6 0.4 0.2 0 1 10 100 1000 L(km)
( ) =1$ cos4 % 13 sin 2 2% 12 sin 2 & 21 ( P " e # " e Physics @ 1 st Δm 2 12 Maximum ') *) +sin 2 2% 13 cos 2 % 12 sin 2 & 31 + tan 2 % 12 sin 2 & 32 ( ) + ), -) 1" sin 2 2# 12 θ 12 sin 2 2" 12 sin 2 " 31 + tan 2 # 12 sin 2 " 32 sin 2 " 31 + tan 2 # 12 sin 2 " 32 Mass Hierarchy
θ 12 H.Minakata, hep-ph/07-1070 1kton 2.5y@ " sin 2 # 12 ~ 2.4% ( 1$ ) sin 2 # 12 Global fit " sin 2 # 12 ~ 6.3% ( 1$ ) sin 2 # 12 solar + KamLAND
Mass Hierarchy " sin 2 2# ( 13 sin 2 $ 31 + tan 2 # 12 sin 2 $ 32 ); $ ij = $m ij 4E ~0.4 2 => Δm 2 23 Δm2 13 amplitude 2 L
Δ 31 J.Learned et al. arxive-0612022 Inverted Hierarchy Normal Hierarchy Δ 32 simulation sin 2 2" 13 = 0.05 3kton* yr @ 1σ M.H.
Physics @ Δm 2 13 2nd Maximum (L~5km) 1.2 1 Reactor Neutrino Oscillation P(!e -->!e ) 0.8 0.6 0.4 0.2 0 1 10 100 1000 L(km) Precise "m 13 2 It is not yet clear about the significance of this measurement.
θ 13 : DoubleChooz, RENO, Dayabay 2010 Sensitivity sin 2 2θ 13 =0.01~0.03 Future High Precision θ 13 ; M~100 @K-K sin 2 2θ 13 <0.01 KASKA-II, Triple Chooz θ 23 Degeneracy with accelerator early sinδ detection with accelerator L=50km, M~3Kton(KK ) High Precision θ 12 ; "sin 2 # 12 sin 2 # 12 ~ 2.4% 1$ Mass hierarchy ( ( )) θ 13 -