D0 Dimuon Asymmetry in $B_s-{\bar{B}}_s$ Mixing and Constraints on New Physics

Abstract

We study the consequences of the large dimuon asymmetry observed at D0. Physics beyond the standard model (SM) in $B_s-{\bar{B}}_s$ mixing is required to explain the data. We first present a detailed analysis for model independent constraints on physics beyond the SM, and then study the implications for theoretical models which modify the SM results in different ways, such as $Z^{\prime }$ with FCNC and R-parity violating SUSY contributions.

Comments: RevTex 13 pages, 6 figures. References added. Modified some discussions. Version to appear in PRD