Importance of threshold corrections in quark–lepton complementarity
2005; Elsevier BV; Volume: 619; Issue: 1-2 Linguagem: Inglês
10.1016/j.physletb.2005.05.065
ISSN1873-2445
AutoresSin Kyu Kang, C. S. Kim, Jake Lee,
Tópico(s)Dark Matter and Cosmic Phenomena
ResumoThe recent experimental measurements of the solar neutrino mixing angle θsol and the Cabibbo mixing angle θC reveal a surprising relation, θsol+θC≃π4. We note that the lepton mixing matrix derived from quark–lepton unification can lead to a shift of the complementarity relation at low energy. While the renormalization group effects generally lead to additive contribution on top of the shift, in this Letter, we show that the threshold corrections which may exist in some intermediate scale new physics such as supersymmetric standard model can diminish it, so we can achieve the complementarity relation at a low energy. Finally, we discuss a possibility to achieve the complementarity relation at a high energy by taking particular form of non-symmetric form of down Yukawa matrix.
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