Mass Mixing, CP Violation and Left-Right Symmetry for Heavy Neutral Mesons

摘要

We investigate M sup 0 - M-bar sup 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 sup 0 - B-bar sup 0 . While the amount of mixing is not much changed with respect to the standard model left-right symmetry can give rise to significantly larger CP violation in the B sup 0 sub(s) - B-bar sup 0 sub(s) system (up to two orders of magnitude for the dilepton charge asymmetry). Sizable CP violating effects require that the left-right contribution to the KsubLKsubS mass difference has the same sign as the standard model contribution. We also comment on D sup 0 - D-bar sup 0 mixing including a careful discussion of the standard model prediction. (Atomindex citation 17:000993)