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题名: On unique predictions for single spin azimuthal asymmetry
作者: Ma, JP ;  Wang, Q
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2004
卷号: 37, 期号:3, 页码:293-298
关键词: DEEP-INELASTIC SCATTERING ;  FINAL-STATE INTERACTIONS ;  DRELL-YAN PROCESS ;  SEMIINCLUSIVE PION ELECTROPRODUCTION ;  POLARIZED DEUTERIUM TARGET ;  CHIRAL-ODD CONTRIBUTION ;  PARTON DISTRIBUTIONS ;  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: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: Theoretically there are two approaches to predict single spin azimuthal asymmetries. One is to take transverse momenta of the partons into account by using transverse momentum dependent parton distributions, while another is to take asymmetries as twist-3 effects. The non-perturbative effects in these approaches are parameterized with different matrix elements, and predictions can be different. Recently, gauge invariant definitions of transverse momentum dependent parton distributions were derived. With these definitions it can be shown that there are relations between non-perturbative matrix elements in these two approaches. These relations may enable us to unify two approaches and to have unique predictions for single spin azimuthal asymmetries. In this letter we derive these relations by using time-reversal symmetry and show that even with these relations the single spin azimuthal asymmetry in a Drell-Yan process is predicted differently in different approaches.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000224915100004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13985
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, JP,Wang, Q. On unique predictions for single spin azimuthal asymmetry[J]. EUROPEAN PHYSICAL JOURNAL C,2004,37(3):293-298.
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