ar X iv : h ep - p h / 04 04 08 1 v 2 1 4 Ju l 2 00 4 Radiative Generation of θ 13 with the Seesaw Threshold Effect
نویسنده
چکیده
We examine whether an appreciable value of the lepton flavor mixing angle θ13 at the electroweak scale ΛEW can be radiatively generated from θ13 = 0 ◦ at the GUT scale ΛGUT. It is found that the renormalization-group running and seesaw threshold effects may lead to θ13 ∼ 5 ◦ at low energies for two simple large-maximal mixing patterns of the MNS matrix in the minimal supersymmetric standard model. If θ12 is sufficiently large at ΛGUT, it will be possible to radiatively produce θ13 ∼ 5 ◦ at ΛEW both in the standard model and in its supersymmetric extensions. The mass spectrum of three heavy right-handed Majorana neutrinos and the cosmological baryon number asymmetry via leptogenesis are also calculated. PACS number(s): 14.60.Pq, 13.10.+q, 25.30.Pt Typeset using REVTEX ∗Mailing address 1
منابع مشابه
ar X iv : h ep - p h / 04 04 08 1 v 3 1 5 Ju l 2 00 4 Radiative Generation of θ 13 with the Seesaw Threshold Effect
We examine whether an appreciable value of the lepton flavor mixing angle θ13 at the electroweak scale ΛEW can be radiatively generated from θ13 = 0 ◦ at the GUT scale ΛGUT. It is found that the renormalization-group running and seesaw threshold effects may lead to θ13 ∼ 5 ◦ at low energies for two simple large-maximal mixing patterns of the MNS matrix in the minimal supersymmetric standard mod...
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