Parton distributions and cos 2 phi(h) asymmetry induced by anomalous photon-quark coupling

doi:10.1103/PhysRevD.97.114010

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	Parton distributions and cos 2 phi(h) asymmetry induced by anomalous photon-quark coupling
	Cao, X 1,2
刊名	PHYSICAL REVIEW D
	2018
卷号	97 期号:11 页码:114010
关键词	DEEP-INELASTIC SCATTERING AZIMUTHAL ASYMMETRIES CHROMOMAGNETIC MOMENT SPIN ASYMMETRIES SIVERS FUNCTION LEPTOPRODUCTION INSTANTONS DEPENDENCE MODEL QCD
ISSN号	2470-0010
DOI	10.1103/PhysRevD.97.114010
英文摘要	In the spectator models of the nucleon with scalar and axial-vector diquarks, we show the effect of Pauli coupling in the photon-quark vertex to the parton distribution functions (PDFs) of nucleon and azimuthal asymmetry in the unpolarized semi-inclusive deep inelastic scattering (SIDIS). This anomalous coupling gives an obvious contribution to unpolarized and polarized PDFs and also leads to a cos 2 phi(h) azimuthal asymmetry proportional to the squared Pauli form factor, due to the helicity flip of the struck quark. After determining the model parameters by fitting PDFs to the global fits, this new distribution for cos 2 phi(h) asymmetry is given numerically. In the framework of transverse momentum dependence (TMD), we find that it is positive and of a few percent in the kinematical regime of HERMES and COMPASS Collaborations, in the same order of magnitude as the Cahn effect.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22884]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Ctr Nucl Matter Sci, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Gansu, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Cao, X. Parton distributions and cos 2 phi(h) asymmetry induced by anomalous photon-quark coupling[J]. PHYSICAL REVIEW D,2018,97(11):114010.
APA	Cao, X.(2018).Parton distributions and cos 2 phi(h) asymmetry induced by anomalous photon-quark coupling.PHYSICAL REVIEW D,97(11),114010.
MLA	Cao, X."Parton distributions and cos 2 phi(h) asymmetry induced by anomalous photon-quark coupling".PHYSICAL REVIEW D 97.11(2018):114010.