Transverse Single Spin Asymmetry in $e+p^\uparrow \to e+J/\psi +X $ and $Q^2$ -evolution of Sivers Function-II

Understand

We present estimates of Single Spin Asymmetry(SSA) in the electroproduction of J/{\psi} taking into account the transverse momentum dependent(TMD) evolution of the Sivers function.

• We estimate SSA for JLab, HERMES, COMPASS and eRHIC energies using color evaporation model of J/{\psi}.
• We have calculated the asymmetry using recent parameters extracted by Echevarria et al.
• using the CSS approach to TMD evolution.