CP Violation in Kaon System in Supersymmetric SU(5) Model with Seesaw-Induced Neutrino Masses

Abstract

CP violations in the kaon system are studied in supersymmetric SU(5) model with right-handed neutrinos. We pay a special attention to the renormalization group effect on the off-diagonal elements of the squark mass matrices. In particular, if the Yukawa couplings and mixings in the neutrino sector are sizable, off-diagonal elements of the right-handed down-type squark mass matrix are generated, which affect CP and flavor violations in decay processes of the kaon. We calculate supersymmetric contributions to epsilon (as well as Delta m_K), Br(K_L -> pi^0 nu \bar{nu}), and epsilon'/epsilon in this framework. We will see that the supersymmetric contribution to the epsilon parameter can be as large as (and in some case, larger than) the experimentally measured value. We also discuss its implication to future tests of the unitarity triangle of the Kobayashi-Maskawa matrix.