The electroweak contribution to the top quark forward-backward asymmetry at the Tevatron
High Energy Physics - Phenomenology
2013-05-29 v1 High Energy Physics - Experiment
Abstract
The electroweak contributions to the forward-backward asymmetry in the production of top-quark pairs at the Tevatron are evaluated at O(alpha^2) and O(alpha*alphas^2). We perform a detailed analysis of all partonic channels that produce an asymmetry and combine them with the QCD contributions. They provide a non-negligible fraction of the QCD-induced asymmetry with the same overall sign, thus enlarging the Standard Model prediction and diminishing the observed deviation. For the observed mass-dependent forward-backward asymmetry a 3-sigma deviation still remains at an invariant-mass cut of M_(t-tbar) > 450 GeV.
Keywords
Cite
@article{arxiv.1107.2606,
title = {The electroweak contribution to the top quark forward-backward asymmetry at the Tevatron},
author = {Wolfgang Hollik and Davide Pagani},
journal= {arXiv preprint arXiv:1107.2606},
year = {2013}
}
Comments
14 pages, 8 figures