Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes

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	Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes
	Ma, JP
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2011
期号	4 页码:62
关键词	DEEP-INELASTIC SCATTERING FINAL-STATE INTERACTIONS TO-BACK JETS AZIMUTHAL ASYMMETRIES PION-PRODUCTION QUARK POLARIZATION QUANTUM CHROMODYNAMICS PARTON DISTRIBUTIONS GAUGE-INVARIANCE CROSS-SECTIONS
ISSN号	1126-6708
通讯作者	Ma, JP (reprint author), Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
英文摘要	We use multi-parton states to examine the leading order collinear factorization of single transverse-spin asymmetries in Drell-Yan processes. Twist-3 operators are involved in the factorization. We find that the so-called soft-gluon-pole contribution in the factorization must exist in order to make the factorization correct. This contribution comes from the corresponding cross-section at one-loop, while the hard-pole contribution in the factorization comes from the cross-section at tree-level. Although the two contributions come from results at different orders, their perturbative coefficient functions in the factorization are at the same order. This is in contrast to factorizations only involving twist-2 operators. The soft-gluon-pole contribution found in this work is in agreement with that derived in a different way. For the hard-pole contributions we find an extra contribution from an extra parton process contributing to the asymmetries. We also solve a part of discrepancy in evolutions of the twist-3 operator. The method presented here for analyzing the factorization can be generalized to other processes and can be easily used for studying factorizations at higher orders, because the involved calculations are of standard scattering amplitudes.
学科主题	Physics
收录类别	SCI
资助信息	National Nature Science Foundation of P.R. China [10975169, 11021092]
原文出处	http://dx.doi.org/10.1007/JHEP04(2011)062
语种	英语
WOS记录号	WOS:000290331700062
公开日期	2013-05-17
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14379]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Ma, JP. Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011(4):62.
APA	Ma, JP.(2011).Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes.JOURNAL OF HIGH ENERGY PHYSICS(4),62.
MLA	Ma, JP."Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes".JOURNAL OF HIGH ENERGY PHYSICS .4(2011):62.