Transverse single spin asymmetry in e plus p↑ → e plus J/ψ plus X and transverse momentum dependent evolution of the Sivers function

被引：32
|
作者：
Godbole, Rohini M. [1 ]
Misra, Anuradha [2 ]
Mukherjee, Asmita [3 ]
Rawoot, Vaibhav S. [4 ]
机构：
[1] Indian Inst Sci, Ctr High Energy Phys, Bangalore 560012, Karnataka, India
[2] Univ Mumbai, Dept Phys, Bombay 400098, Maharashtra, India
[3] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India
[4] Univ Mumbai, Dept Phys, Bombay 400098, Maharashtra, India
来源：
PHYSICAL REVIEW D | 2013年 / 88卷 / 01期
关键词：
POLARIZED PROTON-BEAM; HARD SCATTERING; ANALYZING POWER; QUARK FLAVORS; J-PSI; PREDICTIONS; QCD;
D O I：
10.1103/PhysRevD.88.014029
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We extend our analysis of transverse single spin asymmetry in electroproduction of J/psi to include the effect of the scale evolution of the transverse momentum dependent (TMD) parton distribution functions and gluon Sivers function. We estimate single spin asymmetry for JLab, HERMES, COMPASS, and eRHIC energies using the color evaporation model of charmonium production, using an analytically obtained approximate solution of TMD evolution equations discussed in the literature. We find that there is a reduction in the asymmetry compared with our predictions for the earlier case considered by us, wherein the Q(2) dependence came only from DGLAP evolution of the unpolarized gluon densities and a different parametrization of the TMD Sivers function was used.
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页数：10
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