05/09/2009

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1 05/09/2009

2 * DoubleChooz, RENO, Dayabay *

3 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 F.Suekane, TIPP09 3

4 ( ) $ 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 sin 2 2θ P(!e -->!e ) Normal Hierarchy Inverted Hierarchy sin 2 2θ 13 =0.1 assumed ~sin 2 2θ DC, DB, RENO L(km) KamLAND

5 sin 2 2θ 13 upper limit CHOOZ reactor (ν e --> ν e ) experiment L=1km D=300mwe sin 2 2θ 13 2 =2.5x10-3 ev 2

6 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.

7 Reactor-θ 13 Site Map >2007 RENO Double Chooz Daya Bay

8 Double Chooz Experiment to detect the 3rd ν Oscillation using reactor ν. 0.4km 1.05km P=8.4GWth JPS 8

9 : Detector Design Calibration Glove-Box : Outer Veto : Scintillator panels Target ν : LS; 80% C 12 H % PXE +0,1% Gd + PPO + Bis-MSB 10,3 m 3 γ Catcher : LS; 80% C 12 H % PXE + PPO + Bis-MSB 22,6 m 3 Non scintillating Buffer : mineral oil 114 m 3 7 m Buffer vessel & PMTs : Stainless steel 3 mm Inner Muon Veto : mineral oil PMTs 90 m 3 Steel Shielding : 17 cm steel, All around 7 m

10 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

11 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

12 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) Baseline(km) sin 2 2θ 13 Sensitivity ~0.03 ~0.01 ~0.02

13 ν-detector Double Chooz Daya Bay RENO M=8ton N=1+1 M=20ton N=2+2+4 M=16ton N=1+1

14 Double Chooz Status DOUBLE CHOOZ far IPMU detector FW 14

15 Veto PMT Installed. (2009.2) Detector Tank is ready. (2008.

16 6/2009 Botton & Side PMT (330) installation finished (under Japanese leadership)

17 9/2009 Acrylic Vessels being installed 12/ Electronics installation 1/2010 Scintillator filling 4/2010 Commissioning

18 Staus of Slides: from Courtesy of Prof. Kam_Biu Luk & Prof. Karsten Heeger (2009.3)

19 Civil Construction Inside tunnel Stainless steel tank in China 4-m vessel in the U.S.

20 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

21 Current Status of RENO Slides: Courtesy of Prof. Soo Bong Kim

22 RENO Near and Far Tunnels are ready No Detector Photos

23 Summary of Construction Status (by Soo Bong Kim)

24 Summary of DC, DB, RN DoubleChooz DayaBay RENO Far Near Far Near Far Near DC, Dayabay and RENO finally start data taking within a year.

25 (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

26 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

27 Very precise θ13 KamLAND Reactor Neutrino Oscillation 1.2 sin22θ13=0.1 assumed P(!e -->!e ) Normal Hierarchy 0.2 Inverted Hierarchy L(km) Δm Very precise θ12 Mass Hierarchy F.Suekane@PMN08 27

28 1 st Δm 2 13 Maximum (L~1.5km) = Very Precise θ 13 P.Hauber et al. hrp-ph/ RENO DC DB Distortion normalization => δsin 2 2θ 13 <0.01

29 Target ton Arxive hep-ph/ v1

30 Complementarity of Reactor-accelerator θ 13 measurement θ 23 degeneracy 0.50 ± 0.11 (" µ # " e ) = ( 1! L[ km] ) 2 sin2 2$ 13 ± 0.045sin2$ 13 sin% Matter effect P AC δ dependece L=300km Yasuda Accelerator Measurement Reactor Measurement

31 θ 23 Accelerator 4MW*0.54Mt 2+6years Reactor: 24GW

32 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

33 non-0 δ H.Sugiyama hep-ph/ v1 sin 2 2θ 13 >0.05

34 1 st Δm 2 12 Maximum(L~50km) = Very Precise θ 12 & Mass Hierarchy 50km Reactor Neutrino Oscillation P(!e -->!e ) L(km)

35 ( ) =1$ cos4 % 13 sin 2 2% 12 sin 2 & 21 ( P " e # " e 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

36 θ 12 H.Minakata, hep-ph/ kton " sin 2 # 12 ~ 2.4% ( 1$ ) sin 2 # 12 Global fit " sin 2 # 12 ~ 6.3% ( 1$ ) sin 2 # 12 solar + KamLAND

37 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

38 Δ 31 J.Learned et al. arxive Inverted Hierarchy Normal Hierarchy Δ 32 simulation sin 2 2" 13 = kton* 1σ M.H.

39 Δm nd Maximum (L~5km) Reactor Neutrino Oscillation P(!e -->!e ) L(km) Precise "m 13 2 It is not yet clear about the significance of this measurement.

40 θ 13 : DoubleChooz, RENO, Dayabay 2010 Sensitivity sin 2 2θ 13 =0.01~0.03 Future High Precision θ 13 ; 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 -

21 Daya Bay θ 13 Lawrence Berkeley National Laboratory Brookhaven National Laboratory 2012 ( 24 ) Daya Bay 2011

21 Daya Bay θ 13 Lawrence Berkeley National Laboratory Brookhaven National Laboratory 2012 ( 24 ) Daya Bay 2011 21 Daya Bay θ 13 Lawrence Berkeley National Laboratory YNakajima@lbl.gov Brookhaven National Laboratory thide@bnl.gov 2012 ( 24 ) 5 16 1 Daya Bay 2011 12,, θ 13, 55 2012 3 sin 2 2θ 13 Daya Bay sin 2 2θ

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