Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-09-20
Eur.Phys.J.C39:219-227,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, LaTeX
Scientific paper
10.1140/epjc/s2004-02075-0
We derive the renormalization group equations (RGE) for the flavour coupling matrices of the effective dimension-five operators which yield Majorana neutrino masses in the multi-Higgs-doublet Standard Model; in particular, we consider the case where two different scalar doublets occur in those operators. We also write down the RGE for the scalar-potential quartic couplings and for the Yukawa couplings of that model, in the absence of quarks. As an application of the RGE, we consider two models which, based on a mu-tau interchange symmetry, predict maximal atmospheric neutrino mixing, together with U_{e3} = 0, at the seesaw scale. We estimate the change of those predictions due to the evolution of the coupling matrices of the effective mass operators from the seesaw scale down to the electroweak scale. We derive an upper bound on that change, thereby finding that the radiative corrections to those predictions are in general negligible.
Grimus Walter
Lavoura Luis
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