Shaping the top asymmetry

Abstract

We study different profiles of the distribution of the top forward-backward asymmetry, depending on the invariant mass of the t tbar pair. We show that they can be reproduced by one or more light colour octets, while keeping moderate departures of the t tbar cross section and invariant mass distributions with respect to the Standard Model predictions at Tevatron and LHC.

Comments: LaTeX 14 pages. Final version to appear in PLB, with an enlarged discussion about dijet constraints