Gauge invariance and QCD twist-3 factorization for single spin asymmetries

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	Gauge invariance and QCD twist-3 factorization for single spin asymmetries
	Ma, JP; Zhang, GP
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2015
期号	2 页码:163
关键词	QCD Phenomenology
通讯作者	Ma, JP (reprint author), Acad Sinica, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
英文摘要	The collinear factorization at twist-3 for Drell-Yan processes is studied with the motivation to solve the discrepancy in literature about the single spin asymmetry in the lepton angular distribution, and to show how QCD gauge invariance is realized in the hadronic tensor. The obtained result here agrees with our early result derived with a totally different approach. In addition to the asymmetry we can construct another two observables to identify the spin effect. We show that the gauge invariance of different contributions in the hadronic tensor is made in different ways by summing the effects of gluon exchanges. More interestingly is that we can show that the virtual correction to one structure function of the hadronic tensor, hence to some weighted SSA observables, is completely determined by the quark form factor. This will simplify the calculation of higher order corrections. The corresponding result in semi-inclusive DIS is also given for the comparison with Drell-Yan processes.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
关键词[WOS]	DRELL-YAN PROCESS
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21083]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Ma, JP,Zhang, GP. Gauge invariance and QCD twist-3 factorization for single spin asymmetries[J]. JOURNAL OF HIGH ENERGY PHYSICS,2015(2):163.
APA	Ma, JP,&Zhang, GP.(2015).Gauge invariance and QCD twist-3 factorization for single spin asymmetries.JOURNAL OF HIGH ENERGY PHYSICS(2),163.
MLA	Ma, JP,et al."Gauge invariance and QCD twist-3 factorization for single spin asymmetries".JOURNAL OF HIGH ENERGY PHYSICS .2(2015):163.