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题名: Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes
作者: Ma, JP ;  Sang, HZ
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2011
期号: 4, 页码:62
关键词: DEEP-INELASTIC SCATTERING ;  FINAL-STATE INTERACTIONS ;  TO-BACK JETS ;  AZIMUTHAL ASYMMETRIES ;  PION-PRODUCTION ;  QUARK POLARIZATION ;  QUANTUM CHROMODYNAMICS ;  PARTON DISTRIBUTIONS ;  GAUGE-INVARIANCE ;  CROSS-SECTIONS
学科分类: Physics
通讯作者: Ma, JP (reprint author), Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
部门归属: [Ma, J. P.] Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China; [Ma, J. P.] Peking Univ, Ctr High Energy Phys, Beijing 100080, Peoples R China; [Sang, H. Z.] E China Univ Sci & Technol, Sch Sci, Inst Modern Phys, Shanghai 200237, Peoples R China
英文摘要: We use multi-parton states to examine the leading order collinear factorization of single transverse-spin asymmetries in Drell-Yan processes. Twist-3 operators are involved in the factorization. We find that the so-called soft-gluon-pole contribution in the factorization must exist in order to make the factorization correct. This contribution comes from the corresponding cross-section at one-loop, while the hard-pole contribution in the factorization comes from the cross-section at tree-level. Although the two contributions come from results at different orders, their perturbative coefficient functions in the factorization are at the same order. This is in contrast to factorizations only involving twist-2 operators. The soft-gluon-pole contribution found in this work is in agreement with that derived in a different way. For the hard-pole contributions we find an extra contribution from an extra parton process contributing to the asymmetries. We also solve a part of discrepancy in evolutions of the twist-3 operator. The method presented here for analyzing the factorization can be generalized to other processes and can be easily used for studying factorizations at higher orders, because the involved calculations are of standard scattering amplitudes.
资助者: National Nature Science Foundation of P.R. China [10975169, 11021092]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000290331700062
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14379
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Ma, JP,Sang, HZ. Soft-gluon-pole contribution in single transverse-spin asymmetries of Drell-Yan processes[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011(4):62.
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