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

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.

Comments: 20 pages + appendices, 15 figures; v2: typos fixed, references added; v3: results scaled according to the modified top branching ratios; version accepted for publication in JHEP