Mass mixing,CP violation and left-right symmetry for heavy neutral mesons |
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Authors: | G. Ecker W. Grimus |
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Affiliation: | 1. Institut für Theoretische Physik der Universit?t, Boltzmanngasse 5, A-1090, Wien, Austria
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Abstract: | We investigate (M^0 - bar M^0 ) mixing and CP violation in the minimal left-right symmetric gauge model with spontaneous P and CP violation. The dominant contributions to the mixing amplitude including QCD corrections are calculated explicitly for (B^0 - bar B^0 ) . While the amount of mixing is not much changed with respect to the standard model leftright symmetry can give rise to significantly larger CP violation in the (B_s^0 - bar B_s^0 ) system (up to two orders of magnitude for the dilepton charge asymmetry). Sizable CP violating effects require that the left-right contribution to theK L K S mass difference has the same sign as the standard model contribution. We also comment on (D^0 - bar D^0 ) mixing including a careful discussion of the standard model prediction for the short distance part. |
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