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
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页数：10
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