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Cao Hui-Geng; Ma Jian-Ping; Sang Hua-Zheng; Cao, HG , Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China
Single Transverse Spin Asymmetries at Parton Level
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
关键词Deep-inelastic Scattering Final-state Interactions To-back Jets Azimuthal Asymmetries Quark Polarization Hard-scattering Pion-production Drell-yan Qcd Leptoproduction
摘要Two factorization approaches have been proposed for single transverse spin asymmetries. One is the collinear factorization, the other is the transverse-momentum-dependent factorization. They have been previously derived in a formal way by using diagram expansion at hadron level. If the two factorizations hold or can be proven, they should also hold when we replace hadrons with parton states. We examine these two factorizations at parton level with massless partons. It is nontrivial to generate these asymmetries at parton level with massless partons because the asymmetries require helicity-flip and nonzero absorptive parts in scattering amplitudes. By constructing suitable parton states with massless partons we derive the two factorizations for the asymmetry in Drell-Yan processes. It is found from our results that the collinear factorization derived at parton level is not the same as that derived at hadron level. Our results with massless partons confirm those derived with single massive parton state in our previous works.
2010
ISSN0253-6102
卷号53期号:2页码:313-324
学科领域Physics
收录类别SCI
项目资助者National Natural Science Foundation of China[10721063, 10575126, 10975169] ; National Natural Science Foundation of China[10721063, 10575126, 10975169] ; National Natural Science Foundation of China[10721063, 10575126, 10975169] ; National Natural Science Foundation of China[10721063, 10575126, 10975169]
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被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5167
专题理论物理所科研产出_SCI论文
通讯作者Cao, HG , Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China
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Cao Hui-Geng,Ma Jian-Ping,Sang Hua-Zheng,et al. Single Transverse Spin Asymmetries at Parton Level[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2010,53(2):313-324.
APA Cao Hui-Geng,Ma Jian-Ping,Sang Hua-Zheng,&Cao, HG , Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China.(2010).Single Transverse Spin Asymmetries at Parton Level.COMMUNICATIONS IN THEORETICAL PHYSICS,53(2),313-324.
MLA Cao Hui-Geng,et al."Single Transverse Spin Asymmetries at Parton Level".COMMUNICATIONS IN THEORETICAL PHYSICS 53.2(2010):313-324.
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