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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
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
KeywordDeep-inelastic Scattering Final-state Interactions To-back Jets Azimuthal Asymmetries Quark Polarization Hard-scattering Pion-production Drell-yan Qcd Leptoproduction
AbstractTwo 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
Volume53Issue:2Pages:313-324
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational 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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Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5167
CollectionSCI期刊论文
Corresponding AuthorCao, HG , Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China
Recommended Citation
GB/T 7714
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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