One-loop corrections to the seesaw mechanism in the multi-Higgs-doublet standard model
Jul, 200210 pages
Published in:
- Phys.Lett.B 546 (2002) 86-95
e-Print:
- hep-ph/0207229 [hep-ph]
Report number:
- UWTHPH-2002-21
View in:
Citations per year
Abstract:
We consider the lepton sector of the Standard Model and allow for an arbitrary number of Higgs doublets and, moreover, for the presence of right-handed neutrino singlets which enable the seesaw mechanism. In this framework, we identify and calculate the dominant one-loop radiative corrections to the tree-level mass matrix of the light neutrinos. The interesting feature is that both the tree-level and the one-loop contributions to the light-neutrino mass matrix are quadratic in the Yukawa couplings, with the effect that the one-loop contribution is smaller than the tree-level one mainly because of the one-loop factor . We also point out the possibility of generating radiatively--in this framework--the ratio of solar over atmospheric neutrino mass-squared differences, as needed for the large-mixing-angle MSW solution of the solar-neutrino problem.Note:
- 12 pages, Latex, no figures: one reference and some remarks added, version accepted for publication in Phys. Lett. B Report-no: UWThPh-2002-21
- 14.60.Pq
- 14.60.St
- seesaw model
- Higgs particle: doublet
- neutrino: right-handed
- neutrino: mass
- radiative correction: higher-order
- propagator: renormalization
- neutrino: solar
- neutrino: atmosphere
References(28)
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