evidence of neutrino oscillations

evidence of neutrino oscillations

The evidence of the oscillation of neutrino

A Solar neutrinos

B Atmospheric neutrinos

C Nuclear reactor neutrinos

W e must help you to ensure that America continues

to lead the revolution in science and technology……

Just yesterday in Japan, physicists announced a discovery that tiny neutrinos have mass … but it may change our most fundamental theories from the

nature of the smallest subatomic particles to how the universe itself works, and indeed how it expands

Clinton on neutrino

The President's View

(excerpted from remarks at the MIT

commencement, June 6, 1998)

How Important Neutrino?

A Solar neutrinos

• How the Sun burns

electron neutrinos are produced

Solar neutrino deficit is now understood as

a consequence of neutrinos oscillation.

B Atmospheric neutrinos

Atmosphere

(Sign of the particles are neglected in this figure.)

Kamiokande experiment

Super-Kamiokande experiment

A half of n m lost !!

C Nuclear reactor neutrinos

Reactor Long Baseline Experiment 150 - 210 km

• 1st result

From Mar 4 to Oct.6, 2002

145.1 live days, 162 ton-year ex.

Neutrino disappearence at 99 99%

• 2nd result

From Mar.9 (02) to Jan 11 (04)

515.1 live days, 766.3 ton-y ex.

D Accelerator neutrinos

http://www.nu.to.infn.it/exp/lbl/

Double chooz

(France)

Future Neutrino experiments for 13

RENO (Korea)

Daya Bay (China)

MINOS (USA)

T2K (Japan)

T2KK (Japan & Korea) ???

τ3 τ2

τ1

μ3 μ2

μ1

e3 e2

e1

τ μ e

ν ν

ν

U U

U

U U

U

U U

U ν

ν ν

0 1

0

0 0

0

0 0

1

12 12

12 12

13 13

13 13

23 23

23

s c

c e

s

e s c

c s

s c

Large and maximal mixing!

SNO, solar SK, KamLAND

12 ≈sol ≈ 32°