ASIoP Workshop, Nov04

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Neutrino Oscillation Experiments ? from solar,
cosmic-ray, accelerators reactor neutrinos
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Solar Neutrinos
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Radio-chemical Experiments extracting 30 atoms
from 30 tons (1029 atoms) of target
materials. e.g. GALLEX ne71Ga?71Ge, detected by
EC X-rays
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Super-Kamionkande

• ? Water Cerenkov detector 50k tons, viewed by
  11,000 ?50 cm PMTs in 1000 m underground
  site in central Japan
• ? Physics solar n, atmospheric n , long baseline
  accelerator n, proton decays ..
• ? Accidents (PMTs imploded) Nov 01,
• 50 PMT data again end of 02 !!
• No major deterioration in data quality

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SK gt5 MeV e-ring from nee scattering
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Pure D2O Phase
Actual measurements only detect e- (a burst
of light) deconvolute the channels
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(also Cl, Ga, diff. E)
(also SK)
Standard Solar Model Standard Particle Physics
Model
( 5s effect )
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SK sub-GeV events from atmospheric n interactions
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Atmospheric Neutrinos Up-Down Asymmetry
Deficit
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• nm disappearing, ne OK,
• Strong evidence gt 15s
• Better fits for nt appearing

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KEK-SuperK (K2K)
Accelerator n Flight path 250 km
Deficit of nm at far detector ? spectral
distortion
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KamLAND

• Long Baseline Reactor n
• ? (sensitive to 20 of worlds reactors !)
• ave. flight path of 160 km
• 1 kton liquid scintillator in old Kamiokande
  site
• probe LMA for solar n
• historical results only 5 years from approved
  !!!!

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