The recent experimental measurements of the solar neutrino mixing angle θsol and the Cabibbo mixing angle θC reveal a surprising relation, θsol+θC≃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.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2005 Jul 14|
Bibliographical noteFunding Information:
We would like to thank G. Cvetic for careful reading of the manuscript and his valuable comments. The work of S.K.K. was supported in part by BK21 program of the Ministry of Education in Korea and in part by KOSEF grant R02-2003-000-10085-0. The work of C.S.K. was supported in part by CHEP-SRC Program and in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF. The work of J.L. was supported in part by BK21 program of the Ministry of Education in Korea and in part by Grant No. F01-2004-000-10292-0 of KOSEF-NSFC International Collaborative Research Grant.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics