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

par Ball, Patricia;Frère, Jean-Marie ;Matias, Joaquim
Référence Nuclear physics. B, 572, 1-2, page (3-35)
Publication Publié, 2000-04

Article révisé par les pairs

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Résumé :

We investigate the pattern of CP violation in K0-K0̄, B0d-B0d and B0s-B0s̄ mixing in a symmetrical SU(2)L × SU(2)R × 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 △mK, △mB, ∈, ∈′/∈ and the CP asymmetry aCP in B0d → J/ψK0S. Of 64 possible sets of phases, most are excluded because they imply opposite signs for Re ∈ and aCP. For the one remaining set, aCP is predicted to be small (≤ 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, M2, is restricted to be in the range 2.75 to 13 TeV, and the mass of the flavour-changing neutral Higgs bosons, MH, in 10.2 to 14.6 TeV. This means in particular that the decoupling limit M2,MH → ∞ is already excluded by experiment. © 2000 Elsevier Science B.V. All rights reserved.