Explorations of the Top Quark Forward-Backward Asymmetry at the Tevatron

Abstract

We consider the recent measurement of the top quark forward-backward asymmetry at the Fermilab Tevatron, which shows a discrepancy of slightly more than 2$\sigma$ compared to the SM prediction. We find that $t$-channel exchange of a color sextet or triplet scalar particle can explain the measurement, while leaving the cross section for $t\bar{t}$ production within measured uncertainties. Such particles have good discovery prospects by study of the kinematic structure of $t\bar{t}$+jets at the LHC.

14 pages, 10 figures, 1 table

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