Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Kam-Biu Luk

University of California, Berkeleyand

Lawrence Berkely National Laboratory

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

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Theoretical Predictions

Evidence of Neutrino Oscillation

• Solar neutrinos ( e x ): Homestake (USA)

e + 37Cl 37Ar + e-

1 SNU = 10-36 interaction/atom/s

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

0 1 2 3 4 5 60

1

2

3

4

5

6

7

8

)-2 s-2 cm6 (10e

SNONC

SSMNC

SNOCC

SNOES

Evidence of Neutrino Oscillation (cont.)

• Solar neutrinos ( e x ): SNO (Canada)

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Evidence of Neutrino Oscillation (cont.)

• Atmospheric neutrinos ( ): Super-Kamiokande (Japan)

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Evidence of Neutrino Oscillation (cont.)

• Accelerator anti-neutrinos ( e ): LSND

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Evidence of Neutrino Oscillation (cont.)

• Reactor anti-neutrinos ( e x ) at ~180 km: KamLAND (Japan)

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e

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

• Parametrize the mixing matrix as:

• At large L/E, the probability of ee is:

Neutrino Mixing

U 1 0 0

0 cos23 sin23

0 sin23 cos23

cos13 0 e i sin13

0 1 0

e i sin13 0 cos13

cos12 sin12 0

sin12 cos12 0

0 0 1

P e e 1 sin2 (212 )sin2 m122 L

4E

• For massive neutrinos, the weak eigenstates are not the same as the mass eigenstates:

e

Ue1 Ue2 Ue3U1 U2 U3

U1 U2 U 3

1

2

3

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Reach in ∆m2

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

On-going Verification of Neutrino Oscillation

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1999 dataobserved 29 eventsexpect 44 events (no osc.)

• K2K(Japan): reproducing atmospheric neutrino oscillation ( )

250km

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Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

On-Going Verification of Neutrino Oscillation (cont.)

• MiniBooNe (USA): Repeating LSND

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Upcoming Verification of Neutrino Oscillation

• MINOS (USA): reproducing atmospheric neutrino oscillation using accelerator produced beam

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Soudan Mine730 km away

Fermilab

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Upcoming Verification of Neutrino Oscillation

• CNGS-ICARUS-OPERA (Europe): reproducing atmospheric neutrino oscillation using CERN produced beam

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ICARUS

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003

Search For Subdominant Neutrino Oscillation

• Reactor anti-neutrinos ( e x ) at 1 km: CHOOZ (France), Palo Verde (USA)

sin2(213)

∆m

13

2 (

eV

2)

Neutrino at Daya Bay Kam-Biu Luk28 Nov, 2003