Dm2 : Summary

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Dm2 ? Summary
2002
PDG 2000
SK atm. n
SNO solar n
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2004
K2K Consistent Checks to atm. n
SK
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observations of L/E oscillation signatures from
SK atm-n KamLAND (averaged)..
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Three Families of Neutrino Mixing
The Pontecorvo-Maki-Nakagawa-Sakata (PMNS)
matrix
Q13 crucial unknown towards CP-studies
Possible CP Violation in n Sector
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Neutrino Mass Structures

• Normal Vs Inverted Hierarchy ??
• Quasi-Degenerate Vs Hierarchical ??

Dm2
Atm. n
Solar n
? absolute scale unknown
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I
II
III
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Deeper Physical Questions ..

• In particular
• Is q12qCabbibo p/4 ?
• Is q23p/4 ?
• Is q13 0 ?
• ..

Mixing angles may reveal deeper/higher energy
scale symmetry principles
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Future Experimental Projects

• Long baseline accelerator/reactor experiments
  (NuMI, CNGS, T2K, q13 )
• ?Detailed studies of mixing matrices by
  oscillation studies
• 0nbb experiments
• ? Distinguish mass hierarchy, fix absolute mass
  scales
• Direct mass searches in b-decay
• ? Probe degenerate mass structures
• Neutrino properties (e.g. magnetic moments
  studies)
• ? How neutrino interacts/couples with outside
  world
• Neutrino from sky and earth
• ? do astronomy/earth science with neutrino
  sources, understand roles of neutrinos in
  astrophysics/geophysics

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• 0nbb probe
• nM/nD
• mn hierachy
• mn scale

0nbb Projects
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