We present estimates of transverse single spin asymmetry (TSSA) in p+p↑→J/ψ+X within the colour evaporation model of charmonium production in a generalized parton model (GPM) framework, using the recently obtained best fit parameters for the gluon Sivers function (GSF) extracted from PHENIX data on TSSA in p+p↑→π0+X at midrapidity. We calculate asymmetry at s=200 GeV, and compare the results with PHENIX data on TSSA in the process p+p↑→J/ψ+X. We also present estimates for asymmetry at s=115 GeV corresponding to the proposed fixed target experiment AFTER@LHC and at s=500 GeV corresponding to the higher RHIC energy. Finally, we investigate the effect of the transverse momentum dependent (TMD) evolution of the densities involved, on the asymmetry.
@article{arxiv.1703.01991,
title = {Transverse Single Spin Asymmetry in $p+p^\uparrow \rightarrow J/\psi +X$},
author = {Rohini M. Godbole and Abhiram Kaushik and Anuradha Misra and Vaibhav Rawoot and Bipin Sonawane},
journal= {arXiv preprint arXiv:1703.01991},
year = {2017}
}