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Single Transverse Spin Asymmetries at Parton Level
Cao Hui-Geng; Ma Jian-Ping; Sang Hua-Zheng; Cao, HG , Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China
2010
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号53期号:2页码:313-324
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.
部门归属[Cao, HG] Beijing Univ Civil Engn & Architecture, Sch Sci, Beijing 100044, Peoples R China; [Ma, JP; Sang, HZ] Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China; [Sang, HZ] E China Inst Theoret Phys, Sch Sci, Inst Modern Phys, Shanghai 200237, Peoples R China
关键词Deep-inelastic Scattering Final-state Interactions To-back Jets Azimuthal Asymmetries Quark Polarization Hard-scattering Pion-production Drell-yan Qcd Leptoproduction
学科领域Physics
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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收录类别SCI
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]
WOS记录号WOS:000275133900021
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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1978-2010年知识产出
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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