Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investigating the Transverse Single Spin Asymmetry in the Inelastic
  $J/\Psi$ photoproduction in $p^\uparrow p$ and $p^\uparrow A$ collisions   In this paper we propose to investigate the transverse single spin asymmetry
in the inelastic $J/\Psi$ photoproduction in $p^\uparrow p$ and $p^\uparrow A$
collisions at RHIC energies. At leading order this process probes the gluon
Sivers function. We predict large values for the cross sections, which
indicates that its experimental analysis is, in principle, feasible. The
rapidity dependence of the single spin asymmetry is presented. We obtain that
the asymmetry is strongly dependent on the model used for the gluon Sivers
function and that it can be probed by the analysis of the $J/\Psi$ production
at forward rapidities. Our results indicate that a future experimental analysis
of this process can be useful to constrain the gluon Sivers function.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph