Hadronic top-quark pair production with NNLL threshold resummation

被引：249
|
作者：
Beneke, M. [2 ]
Falgari, P. [1 ,4 ]
Klein, S. [2 ]
Schwinn, C. [3 ]
机构：
[1] Univ Utrecht, Inst Theoret Phys, NL-3508 TD Utrecht, Netherlands
[2] Rhein Westfal TH Aachen, Inst Theoret Teilchenphys & Kosmol, D-52056 Aachen, Germany
[3] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany
[4] Univ Utrecht, Spinoza Inst, NL-3508 TD Utrecht, Netherlands
来源：
NUCLEAR PHYSICS B | 2012年 / 855卷 / 03期
基金：
美国国家科学基金会;
关键词：
PRODUCTION NEAR-THRESHOLD; PRODUCTION CROSS-SECTION; PARTON DISTRIBUTIONS; MELLIN TRANSFORMS; HARMONIC SUMS; EXPANSION; SERIES;
D O I：
10.1016/j.nuclphysb.2011.10.021
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We compute the total top-quark pair production cross section at the Tevatron and LHC based on approximate NNLO results, and on the summation of threshold logarithms and Coulomb enhancements to all orders with next-to-next-to-leading logarithmic (NNLL) accuracy. including bound-state effects. We find sigma(tt)-(Tevatron) = (7.22(-0.047-0.55)(+0.31+0.71)) pb, sigma(tt)-(LHC, root s = 7 TeV) = (162.6(-7.6-14.7)(+7.4+15.4)) pb for m(t) = 173.3 GeV. The implementation of joint soft and Coulomb resummation, its ambiguities, and the present theoretical uncertainty are discussed in detail. We further obtain new approximate results at (NLO)-L-3. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：695 / 741
页数：47
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