QCD corrections to top quark pair production in association with a photon at hadron colliders

被引：82

作者：

Melnikov, Kirill ^{[1
]}

Schulze, Markus ^{[1
]}

Scharf, Andreas ^{[2
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA

来源：

PHYSICAL REVIEW D | 2011年 / 83卷 / 07期

基金：

美国国家科学基金会;

关键词：

ONE-LOOP CORRECTIONS; JET; AMPLITUDES; ALGORITHM;

D O I：

10.1103/PhysRevD.83.074013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute QCD corrections to the production of a t (t) over bar pair in association with a hard photon at the Tevatron and the LHC. This process allows a direct measurement of the top quark electromagnetic couplings that, at the moment, are only loosely constrained. We include top quark decays, treating them in the narrow width approximation, and retain spin correlations of final-state particles. Photon radiation off top quark decay products is included in our calculation and yields a significant contribution to the cross section. We study next-to-leading-order QCD corrections to the p (p) over bar -> t (t) over bar gamma process at the Tevatron for the selection criteria used in a recent measurement by the CDF collaboration. We also discuss the impact of QCD corrections to the pp -> t (t) over bar gamma process on the measurement of the top quark electric charge at the 14 TeV LHC.

引用

页数：18

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