Gluon tomography from deeply virtual Compton scattering at small x

被引：51
|
作者：
Hatta, Yoshitaka [1 ]
Xiao, Bo-Wen [2 ,3 ]
Yuan, Feng [4 ]
机构：
[1] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
[2] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China
[3] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China
[4] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA
来源：
PHYSICAL REVIEW D | 2017年 / 95卷 / 11期
关键词：
GENERALIZED PARTON DISTRIBUTIONS; VECTOR-MESONS; NUCLEON; QCD;
D O I：
10.1103/PhysRevD.95.114026
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a full evaluation of the deeply virtual Compton scattering cross section in the dipole framework in the small-x region. The result features the cos phi and cos 2 phi azimuthal angular correlations, which have been missing in previous studies based on the dipole model. In particular, the cos 2 phi term is generated by the elliptic gluon Wigner distribution of which the measurement at the planned electron-ion collider provides important information about the gluon tomography at small x. We also show the consistency with the standard collinear factorization approach based on the quark and gluon generalized parton distributions.
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页数：12
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