Transverse momentum-weighted Sivers asymmetry in semi-inclusive deep inelastic scattering at next-to-leading order

被引：30

作者：

Kang, Zhong-Bo ^{[1
]}

Vitev, Ivan ^{[1
]}

Xing, Hongxi ^{[2
,3
,4
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China

[3] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Study, Hefei 230026, Peoples R China

[4] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 03期

关键词：

SPIN ASYMMETRIES; SINGLE-SPIN;

D O I：

10.1103/PhysRevD.87.034024

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the next-to-leading order perturbative QCD corrections to the transverse momentum-weighted Sivers asymmetry in semi-inclusive hadron production in lepton-proton deep inelastic scattering. The corresponding differential cross section is evaluated as a convolution of a twist-three quark-gluon correlation function, often referred to as Qiu-Sterman function, the usual unpolarized fragmentation function, and a hard coefficient function. By studying the collinear divergence structure, we identify the evolution kernel for the Qiu-Sterman function. The hard coefficient function, which is finite and free of any divergence, is evaluated at one-loop order. DOI: 10.1103/PhysRevD.87.034024

引用

页数：10

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