Soft radiation in heavy-particle pair production: All-order colour structure and two-loop anomalous dimension

被引：143

作者：

Beneke, M. ^{[1
]}

Falgari, P. ^{[2
]}

Schwinn, C. ^{[2
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany

[2] Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England

来源：

NUCLEAR PHYSICS B | 2010年 / 828卷 / 1-2期

关键词：

PRODUCTION NEAR-THRESHOLD; TOP-QUARK PRODUCTION; CROSS-SECTIONS; DRELL-YAN; RESUMMATION; QCD;

D O I：

10.1016/j.nuclphysb.2009.11.004

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 consider the total production cross section of heavy coloured particle pairs in hadronic collisions at the production threshold. We construct a basis in colour space that diagonalizes to all orders in perturbation theory the soft function, which appears in a new factorization formula for the combined resummation of soft gluon and Coulomb gluon effects. This extends recent results on the structure of soft anomalous dimensions and allows Lis to determine an analytic expression for the two-loop soft anomalous dimension at threshold for all production processes of interest. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：69 / 101

页数：33

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