Precision predictions for the t(t)over-bar production cross section at hadron colliders

被引：82

作者：

Ahrens, Valentin ^{[1
]}

Ferroglia, Andrea ^{[2
]}

Neubert, Matthias ^{[1
]}

Pecjak, Ben D. ^{[1
]}

Yang, Li Lin ^{[3
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys THEP, D-55099 Mainz, Germany

[2] New York City Coll Technol, Brooklyn, NY 11201 USA

[3] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

来源：

PHYSICS LETTERS B | 2011年 / 703卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

HEAVY-QUARK PRODUCTION; QCD CORRECTIONS; THRESHOLD EXPANSION; PAIR PRODUCTION; POLE MASS; (MS)OVER-BAR; 2-LOOPS;

D O I：

10.1016/j.physletb.2011.07.058

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We make use of recent results in effective theory and higher-order perturbative calculations to improve the theoretical predictions of the top-quark pair production cross section at hadron colliders. In particular, we supplement the fixed-order NLO calculation with higher-order corrections from soft gluon resummation at NNLL accuracy. Uncertainties due to power corrections to the soft limit are estimated by combining results from single-particle inclusive and pair invariant-mass kinematics. We present our predictions as functions of the top-quark mass in both the pole scheme and the (MS) over bar scheme. We also discuss the merits of using threshold masses as an alternative, and calculate the cross section with the top-quark mass defined in the 1S scheme as an illustrative example. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：135 / 141

页数：7

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