D0 Dimuon Asymmetry in $B_s - \bar B_s$ Mixing and Constraints on New Physics
N. G. Deshpande, Xiao-Gang He, German Valencia
TL;DR
This paper investigates the large dimuon asymmetry observed at D0, analyzing how new physics beyond the Standard Model, such as $Z'$ and R-parity violating SUSY, could explain the data and constrain theoretical models.
Contribution
It provides a detailed, model-independent analysis of constraints on new physics in $B_s-ar B_s$ mixing and explores implications for specific models like $Z'$ and SUSY.
Findings
Constraints on new physics models from D0 asymmetry data
Implications for $Z'$ with FCNC contributions
Implications for R-parity violating SUSY
Abstract
We study the consequences of the large dimuon asymmetry observed at D0. Physics beyond the standard model (SM) in 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 with FCNC and R-parity violating SUSY contributions.
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