Importance of threshold corrections in quark-lepton complementarity

Kyu Kang Sin, C. S. Kim, Jake Lee

Research output: Contribution to journalArticle

26 Citations (Scopus)


The recent experimental measurements of the solar neutrino mixing angle θsol and the Cabibbo mixing angle θC reveal a surprising relation, θsolC≃π/4. 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.

Original languageEnglish
Pages (from-to)129-135
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 2005 Jul 14

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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