CP violation in Bd→ φKS in SUSY GUT with right-handed neutrinos

Abstract

CP violation in the B d system is discussed in the supersymmetric grand unified theory (GUT) with the right-handed neutrinos. Above the GUT scale, the right-handed down-type squarks couple to the right-handed neutrinos. Due to the renormalization group effect, flavor violations in the lepton sector may be transferred to the right-handed down-type squark mass matrix, which affects the CP violation in the B decay. Taking into account this effect, we compare the CP violation in B d → ψK S and B d → φK S processes. We will find that a significant difference is possible between the CP violating phases in two decay processes.