Gluon Sivers Function and Single Spin Asymmetry in $e+p^\uparrow \rightarrow e+J/Ï+ X$
arXiv:1210.1046
Abstract
We propose measurement of transverse single spin asymmetry (SSA) in charmonium production as a probe of gluon Sivers function. We estimate SSA in low virtuality electroproduction of $J/Ï$ using color evaporation model of charmonium production and existing models of the gluon Sivers function and find sizable asymmetry at JLab, HERMES, COMPASS and eRHIC energies.
Proceedings of QNP 2012, Sixth International Conference on Quarks and Nuclear Physics, April 16-20, 2012. Ecole Polytechnique, Palaiseau, Paris