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.

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

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