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题名: Partonic state and single transverse spin asymmetry in Drell-Yan process
作者: Ma, J. P. ;  Sang, H. Z.
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2008
期号: 11, 页码:-
关键词: DEEP-INELASTIC SCATTERING ;  SEMIINCLUSIVE PION ELECTROPRODUCTION ;  POLARIZED DEUTERIUM TARGET ;  TO-BACK JETS ;  AZIMUTHAL ASYMMETRIES ;  QUARK POLARIZATION ;  CROSS-SECTIONS ;  FRAGMENTATION FUNCTION ;  HARD SCATTERING ;  SIVERS FUNCTION
学科分类: Physics
通讯作者: Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
部门归属: [Ma, JP; Sang, HZ] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: Single transverse-spin asymmetries have been studied intensively both in experiment and theory. Theoretically, two factorization approaches have been proposed. One is by using transverse-momentum-dependent factorization and the asymmetry comes from the so called Sivers function. Another is by using collinear factorization where the non- perturbative effect is parameterized by a twist-3 hadronic matrix element. However, the factorized formulas for the asymmetries in the two approaches are derived at hadron level formally by diagram expansion, where one works with various part on density matrices of hadrons. If the two factorizations hold, they should also hold at parton level. We examine this for Drell-Yan processes by replacing hadrons with partons. By calculating the asymmetry, Sivers function and the twist-3 matrix element at nontrivial leading order of alpha(s), we find that we can reproduce the result of the transverse-momentum-dependent factorization. But we can only verify the result of the collinear factorization partly. Two formally derived relations between Sivers function and the twist-3 matrix element are also examined with negative results.
资助者: National Nature Science Foundation of P.R.China[10721063, 10575126]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000261315100090
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5446
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ma, J. P.,Sang, H. Z.. Partonic state and single transverse spin asymmetry in Drell-Yan process[J]. JOURNAL OF HIGH ENERGY PHYSICS,2008(11):-.
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