S. Sahoo, M. Kumar, D. Banerjee
The recent observation of the same-sign dimuon charge asymmetry in the B system by the D0 collaboration has 3.9 sigma deviation from the standard model prediction. However, the recent LHCb data on B-s neutral-meson mixing do not accommodate the D0 collaboration result. In this paper, considering the effect of Z'-mediated flavour-changing neutral currents in the $ B_q^0 - bar B_q^0$ (q = d, s) mixing, the same-sign dimuon charge asymmetry is calculated. We find the same-sign dimuon charge asymmetry is enhanced from its SM prediction and provides signals for new physics beyond the SM
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http://arxiv.org/abs/1306.5087
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