What the top asymmetries tell us about single top production and Higgs decays

TL;DR

This paper explores how an extra scalar doublet could simultaneously explain top asymmetry anomalies at the Tevatron and Higgs decay discrepancies at the LHC, linking them through electroweak precision constraints.

Contribution

It proposes a model with an additional scalar doublet that connects top asymmetries and Higgs decay anomalies via electroweak constraints, predicting observable collider signatures.

Findings

Predicts a bump in the invariant mass distribution of light jets in semi-leptonic single top production.

Provides a unified explanation for Tevatron and LHC anomalies within a scalar extension of the Standard Model.

Shows consistency with electroweak precision tests (S and T parameters).

Abstract

The top asymmetries measured at the Tevatron, and the discrepancy in the di-photon Higgs rate under investigation at the LHC represent two possible hints of physics beyond the Standard Model (SM). In this paper we address the possibility to explain and relate both these experimental anomalies with the help of an extra scalar doublet in addition to the SM particle spectrum. The connection is provided by the constraints that the electroweak precision tests impose on the oblique S and T parameters. As a result, considering the semi-leptonic single top production in the tW-channel at the LHC, our analysis predicts a bump in the invariant mass distribution of the two light jets.