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

doi:10.1007/JHEP04(2011)062

	Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes
	Ma, J. P.1,2; Sang, H. Z.3
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2011-04-01
页码	26
关键词	QCD Phenomenology
ISSN号	1029-8479
DOI	10.1007/JHEP04(2011)062
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.
资助项目	National Nature Science Foundation of P.R. China[10975169] ; National Nature Science Foundation of P.R. China[11021092]
WOS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
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000290331700062
资助机构	National Nature Science Foundation of P.R. China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/34996]
专题	中国科学院近代物理研究所
通讯作者	Ma, J. P.
作者单位	1.Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China 2.Peking Univ, Ctr High Energy Phys, Beijing 100080, Peoples R China 3.E China Univ Sci & Technol, Sch Sci, Inst Modern Phys, Shanghai 200237, Peoples R China
推荐引用方式 GB/T 7714	Ma, J. P.,Sang, H. Z.. Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011:26.
APA	Ma, J. P.,&Sang, H. Z..(2011).Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes.JOURNAL OF HIGH ENERGY PHYSICS,26.
MLA	Ma, J. P.,et al."Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes".JOURNAL OF HIGH ENERGY PHYSICS (2011):26.