The like-sign dimuon charge asymmetry in SUSY models

TL;DR

This paper investigates the implications of a recent anomaly in dimuon charge asymmetry for various new physics models, especially supersymmetric theories, and predicts potential signals in lepton flavor violation experiments.

Contribution

It analyzes the impact of the dimuon asymmetry deviation on SUSY and GUT models, providing predictions for lepton flavor violation rates relevant for future experiments.

Findings

SUSY models can explain the asymmetry deviation.

Predicted tau --> mu + gamma rates are detectable at future Super-B factories.

GUT scale relations link squark and slepton masses, affecting LFV predictions.

Abstract

We study the new physics (NP) implications of the recently reported 3.2 sigma Standard Model (SM) deviation in the like-sign dimuon asymmetry at the Tevatron. Assuming that new physics only enters the B(s) mixing amplitude we explore the implications for generic new physics, general supersymmetric (SUSY) models and also SUSY SU(5). In the case of SUSY SU(5) we exploit the GUT scale relationship between slepton and squark soft masses to predict rates for lepton flavour violation (LFV). The predicted rates for tau --> mu + gamma are found to be detectable at future Super-B factories.