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arXiv 1310.0752hep-ph
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横向单自旋不对称性与粲偶素的产生

Transverse Single Spin Asymmetries and Charmonium Production

Rohini M. Godbole, Anuradha Misra, Asmita Mukherjee, Vaibhav S. Rawoot

摘要:

利用粲偶素产生的颜色蒸发模型,估算了$e+p^\uparrow \to J/ψ+X$过程中的横向自旋单自旋不对称性(TSSA).我们考虑到横向动量依赖(TMD)的演化的Sivers功能和部分子分布函数,并表明,有一个减少的不对称性相比,我们以前的估计,其中$Q^2$ -演化只通过DGstrial演化的非极化胶子密度。

英文摘要:

We estimate transverse spin single spin asymmetry(TSSA) in the process $e+p^\uparrow \to J/ψ+X$ using color evaporation model of charmonium production. We take into account transverse momentum dependent(TMD) evolution of Sivers function and parton distribution function and show that the there is a reduction in the asymmetry as compared to our earlier estimates wherein the $Q^2$ - evolution was implemented only through DGLAP evolution of unpolarized gluon densities.

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