Eur. Phys. J. C (2013) 73: 2277
https://doi.org/10.1140/epjc/s10052-013-2277-1

Regular Article - Theoretical Physics

Large and unified description of quark and lepton mixing matrices

¹ Department of Physics, Osaka University, Toyonaka, Osaka, 560-0043, Japan
² Faculty of Information Science and Technology, Osaka Institute of Technology, Hirakata, Osaka, 573-0196, Japan

^* e-mail: koide@het.phys.sci.osaka-u.ac.jp

Received: 28 October 2012
Revised: 21 December 2012
Published online: 23 January 2013

Abstract

We present a revised version of the so-called “yukawaon model”, which was proposed for the purpose of a unified description of the lepton mixing matrix U _PMNS and the quark mixing matrix V _CKM. It is assumed from a phenomenological point of view that the neutrino Dirac mass matrix M _D is given with a somewhat different structure from the charged lepton mass matrix M _e , although M _D =M _e was assumed in the previous model. As a result, the revised model predicts a reasonable value sin²2θ ₁₃∼0.07 with keeping successful results for other parameters in U _PMNS as well as V _CKM and quark and lepton mass ratios.