Sivers Asymmetry in $e+p^\uparrow \rightarrow e+J/\psi+X$

TL;DR

This paper investigates the Sivers asymmetry in $J/ar{J}$ production via electron-proton collisions, demonstrating its potential to probe the gluon Sivers function and revealing sizable asymmetries in the process.

Contribution

It introduces the use of low virtuality electroproduction of $J/ar{J}$ as a new method to explore the gluon Sivers function, highlighting its effectiveness as a probe.

Findings

Sizable single spin asymmetry observed in $J/\psi$ production.

The asymmetry can serve as a probe for the gluon Sivers function.

Potential for experimental measurement in future experiments.

Abstract

A recent investigation of the single spin asymmetry (SSA) in low virtuality electroproduction/photoproduction of $J/\psi$ in color evaporation model is presented. It is shown that the asymmetry is sizable and can be used as a probe for the still unknown gluon Sivers function.