## XXth International Conference on Neutrino Physics and Astrophysics

S.Pascoli

**
Neutrinoless Double Beta Decay, Neutrino Masses and CP-Violation
**

Assuming massive Majorana neutrinos, 3-neutrino mixing and a rather
precise determination of the parameters characterizing the neutrino
oscillation solutions of the solar and atmospheric neutrino problems,
we discuss the infomation a measurement of effective Majorana mass
|| can give on the neutrino mass spectrum, on the absolute values
of neutrino masses and on CP-violation in the lepton
sector. Furthermore we consider the implications that a measurement of
the electron neutrino mass in tritium beta-decay experiments, combined
with a measurement of ||, have for the possible determination of
the leptonic CP-violation and in particular of the Majorana
CP-violating phases.

Based on S.M.Bilenky, S.Pascoli & S.T.Petcov, "Majorana
Neutrinos, Neutrino Mass Spectrum, CP-Violation and Neutrinoless
Double Beta-Decay: I. The Three-Neutrino Mixing Case",
Phys.Rev. D 64 (2001) 053010
[hep-ph/0102265].

S.Pascoli, S.T.Petcov & L.Wolfenstein,
"Searching for the CP-Violation Associated with Majorana Neutrinos",
Phys. Lett. B 524 (2002) 319
[hep-ph/0110287].

S.Pascoli & S.T.Petcov,
"Majorana Neutrinos, CP-Violation, Neutrinoless Double-Beta and
Tritium-Beta Decays",
hep-ph/0111203