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Cao, X1,2
Parton distributions and cos 2 phi(h) asymmetry induced by anomalous photon-quark coupling
发表期刊PHYSICAL REVIEW D
语种英语
关键词DEEP-INELASTIC SCATTERING AZIMUTHAL ASYMMETRIES CHROMOMAGNETIC MOMENT SPIN ASYMMETRIES SIVERS FUNCTION LEPTOPRODUCTION INSTANTONS DEPENDENCE MODEL QCD
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.
2018
ISSN2470-0010
卷号97期号:11页码:114010
学科领域Astronomy & Astrophysics ; Physics
学科门类Astronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.97.114010
收录类别SCIE
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22884
专题理论物理所科研产出_SCI论文
作者单位1.Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Inst Modern Phys, Ctr Nucl Matter Sci, Lanzhou 730000, Gansu, Peoples R China
3.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
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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.
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