Soft-gluon resummation for boosted top-quark production at hadron colliders

被引：31

作者：

Ferroglia, Andrea ^{[1
]}

Pecjak, Ben D. ^{[2
]}

Yang, Li Lin ^{[3
]}

机构：

[1] New York City Coll Technol, New York, NY 11201 USA

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

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

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 03期

基金：

美国国家科学基金会; 瑞士国家科学基金会;

关键词：

2-LOOP QCD CORRECTIONS; THRESHOLD RESUMMATION; CROSS-SECTION; HEAVY QUARKS; SCATTERING; FRAGMENTATION; ENERGY; LIGHT;

D O I：

10.1103/PhysRevD.86.034010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the production of highly energetic top-quark pairs at hadron colliders, focusing on the case where the invariant mass of the pair is much larger than the mass of the top quark. In particular, we set up a factorization formalism appropriate for describing the differential partonic cross section in the double soft and small-mass limit, and explain how to resum simultaneously logarithmic corrections arising from soft gluon emission and from the ratio of the pair-invariant mass to that of the top quark to next-to-next-to-leading logarithmic accuracy. We explore the implications of our results on approximate next-to-next-to-leading order formulas for the differential cross section in the soft limit, pointing out that they offer a simplified calculational procedure for determining the currently unknown delta-function terms in the limit of high invariant mass.

引用

页数：18

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