Dipole subtraction at next-to-leading order in nonrelativistic-QCD factorization

被引：6

作者：

Butenschoen, Mathias ^{[1
]}

Kniehl, Bernd A. ^{[1
]}

机构：

[1] Univ Hamburg, Inst Theoret Phys 2, Luruper Chaussee 149, D-22761 Hamburg, Germany

来源：

NUCLEAR PHYSICS B | 2020年 / 950卷

关键词：

D O I：

10.1016/j.nuclphysb.2019.114843

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 describe an implementation of a subtraction scheme in the nonrelativistic-QCD treatment of heavy-quarkonium production at next-to-leading-order in the strong-coupling constant, covering S- and P-wave bound states. It is based on the dipole subtraction in the massless version by Catani and Seymour and its extension to massive quarks by Phaf and Weinzierl. Important additions include the treatment of heavy-quark bound states, in particular due to the more complicated infrared-divergence structure in the case of P-wave states. (C) 2019 The Author(s). Published by Elsevier B.V.

引用

页数：27

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