Electroweak contribution to the top quark forward-backward asymmetry at the Tevatron

被引：144

作者：

Hollik, Wolfgang ^{[1
]}

Pagani, Davide ^{[1
]}

机构：

[1] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 09期

关键词：

HEAVY; HADROPRODUCTION; DISTRIBUTIONS;

D O I：

10.1103/PhysRevD.84.093003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 alpha(2)(s)). 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 addition to 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 (t) over bar > 450 GeV.

引用

页数：7

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