CP Phases in Models with Some Fermion Masses Vanishing and/or Degenerate

Details CP Phases in Models with Some Fermion Masses Vanishing and/or Degenerate CP Phases in Models with Some Fermion Masses Vanishing and/or Degenerate

1996-03-05

arxiv.org/abs/hep-ph/9603223v1

Acta Phys.Polon. B27 (1996) 971-984

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, no figures. Full postscript file available at: http://deneb.ugr.es/preprints/ugft58.ps

Scientific paper

We count the number of CP breaking phases in models with $SU(2)_L\times U(1)_Y$ and $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ electroweak gauge groups and extended matter contents with some fermion masses vanishing and/or degenerate. Quarks and leptons, including Majorana neutrinos, are treated in a similar way. CP violation is characterized in the mass-eigenstate and in the weak-eigenstate bases. Necessary and sufficient conditions for CP conservation, invariant under weak basis redefinitions are also studied in these models. CP violating factors entering in physical observables and only invariant under phase redefinitions are discussed.

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