Single Spin Asymmetry in Charmonium Production

被引：0

作者：

Godbole, Rohini M. ^{[1
]}

Kaushik, Abhiram ^{[1
]}

Misra, Anuradha ^{[2
]}

Rawoot, Vaibhav ^{[3
]}

机构：

[1] Indian Inst Sci, Bangalore 560012, Karnataka, India

[2] Univ Bombay, Dept Phys, Bombay 400098, Maharashtra, India

[3] Inst Math Sci, Chennai 600113, Tamil Nadu, India

来源：

FEW-BODY SYSTEMS | 2015年 / 56卷 / 6-9期

关键词：

Transverse Momentum; Evolution Kernel; Single Spin Asymmetry; DGLAP Evolution; Transverse Momentum Dependent Distribution;

D O I：

10.1007/s00601-015-0945-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present estimates of single spin asymmetry (SSA) in the electroproduction of taking into account the transverse momentum dependent (TMD) evolution of the gluon Sivers function and using Color Evaporation Model of charmonium production. We estimate SSA for JLab, HERMES, COMPASS and eRHIC energies using recent parameters for the quark Sivers functions which are fitted using an evolution kernel in which the perturbative part is resummed up to next-to-leading logarithms accuracy. We find that these SSAs are much smaller as compared to our first estimates obtained using DGLAP evolution but are comparable to our estimates obtained using TMD evolution where we had used approximate analytical solution of the TMD evolution equation for the purpose.

引用

页码：461 / 467

页数：7

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