Abstract
Motivated by recently observed anomalously large dimuon charge asymmetry in neutral B decays reported by the D0 collaboration, we study the effects of a family of non-universal Z′ bosons for possible solutions. The fitting results for the Z′ parameters are presented under the constraints from the D0 result for assl and UT fit results for CBs and ϕBs in two limiting scenarios for left- and right-handed b — s — Z′ couplings. We find the couplings BLsb and BRsb are rigorously bounded but not excluded, which means that the anomalies in the Bs — B̄s system could be moderated simultaneously within a non-universal Z′ model. Numerically, a new weak phase ϕsL ∼ −60° (−80°) in scenario I or ∼ 30° (10°) in scenario II is crucial to moderate the large dimuon charge asymmetry.
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