Probing the colour structure of the top quark forward-backward asymmetry

被引：0
|
作者：
Ben Gripaios
Andreas Papaefstathiou
Bryan Webber
机构：
[1] Cavendish Laboratory,Institut für Theoretische Physik
[2] Universität Zürich,undefined
来源：
Journal of High Energy Physics | / 2013卷
关键词：
Heavy Quark Physics; Beyond Standard Model; QCD;
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学科分类号：
摘要：
We point out that QCD coherence effects can help to identify the colour structure of possible new physics contributions to the anomalously large forward-backward asymmetry in top quark pair production. New physics models that yield the same inclusive asymmetry make different predictions for its dependence on the transverse momentum of the pair, if they have different colour structures. From both a fixed-order effective field theory approach and Monte Carlo studies of specific models, we find that an s-channel octet structure is preferred.
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