Anatomy of mixing-induced CP asymmetries in left-right symmetric models with spontaneous CP violation

摘要

We investigate the pattern of CP violation in K-0-K-0, B-d(0)-B-d(0) and B-s(0)-B-s(0) mixing in a symmetrical SU(2)(L) x SU(2)(R) x U(1) model with spontaneous CP violation. From a set of fixed quark masses and mixings, we calculate the phases of the left and right quark mixing matrices beyond the small phase approximation and perform a careful analysis of all relevant restrictions on the model's parameters from Delta m(K), Delta m(B), epsilon, epsilon'/epsilon and the CP asymmetry a(CP) in B-d(0) --> J/phi K-S(0). Of 64 possible sets of phases, most are excluded because they imply opposite signs for Re epsilon and a,,. For the one remaining set, a,, is predicted to be small (less than or equal to 0.1) for the chosen input quark masses and mixings. Barring an instability with respect to these input values, the model is thus soon to be critically tested at B factories. The mass of the right-handed charged gauge boson, M-2, is restricted to be in the range 2.75 to 13 TeV, and the mass of the flavour-changing neutral Higgs bosons, M-H, in 10.2 to 14.6 TeV. This means in particular that the decoupling limit M2, MH --> infinity is already excluded by experiment. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 49]