TH Meeting on Particle Physics Phenomenology

Some aspects of symmetries and CP violation in the leptonic sector

Name: Some aspects of symmetries and CP violation in the leptonic sector
Start: 2003-02-28T14:00:00+01:00
End: 2003-02-28T15:00:00+01:00
Location: CERN

by Joaquim SILVA-MARCOS (Technical Univ. Lisbon & CERN-TH)

Friday 28 Feb 2003, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

TH Auditorium

CERN

Description

We discuss some aspects of two salient features of leptons: large mixing and (possible) CP violating Majorana phases. In the quark sector simple S₃ permutation symmetries can generate the general features of quark masses and mixing. Might large lepton mixing be related to any (permutation) symmetry? If neu-trinos are Majorana, then there can be more than one CP violating phase in lepton mixing. Might there be a relation between the Dirac-type phase, the Majorana phases and other mixing parameters? We discuss a parameterization of the Majorana neutrino mass matrix that, while having only one complex phase, can reproduce all three CP violation phases (1 Dirac-type and 2 Majorana).