The like-sign dimuon asymmetry and New Physics

Abstract

The measurement by the D0 collaboration of a large like-sign dimuon asymmetry deviates significantly from Standard Model expectations. New Physics may be invoked to account for such a deviation. We analyse how generic extensions of the Standard Model where the Cabibbo-Kobayashi-Maskawa $3\times 3$ mixing matrix is enlarged can accommodate a significant enhancement of $A_{SL}^b$ with respect to standard expectations through enhancements of the individual semileptonic asymmetries $A_{SL}^d$ and $A_{SL}^s$ in the $B_d^0$-${\bar{B}}_d^0$ and $B_s^0$-${\bar{B}}_s^0$ systems. The potential enhancement reachable in this class of scenario is, nevertheless, insufficient to reproduce the D0 measurement.

Proceedings of the 8th International Workshop on the CKM Unitarity Triangle (CKM 2014), Vienna, Austria, September 8-12, 2014 5 pages, 2 figures

Cited by in corpus (1)

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