A like-sign dimuon charge asymmetry at Tevatron induced by the anomalous top quark couplings

TL;DR

This paper proposes that anomalous right-handed top quark couplings can explain the observed deviation in like-sign dimuon charge asymmetry at Tevatron, supported by combined analysis with B-meson mixing and decay data.

Contribution

It introduces a novel explanation for the dimuon charge asymmetry via anomalous top couplings and analyzes their effects in conjunction with B-meson processes.

Findings

Anomalous top couplings can account for the 3.2 sigma deviation.

Combined analysis constrains the possible anomalous couplings.

Discrimination methods for different anomalous couplings are discussed.

Abstract

We show that the recently measured 3.2 $\sigma$ deviations of the charge asymmetry of like-sign dimuon events from the standard model prediction by the D0 collaboration at Tevatron can be explained by introducing the anomalous right-handed top quark couplings. Combined analysis with the $\bs$ and $\bd$ mixings and $B \to X_s \gamma$ decays has been performed. We discuss how to discriminate the effects on the dimuon charge asymmetry of the anomalous $\tsW$ and $\tbW$ couplings.