Estimates for the single-spin asymmetries in $p^{\uparrow }p\to J/\psi X$ process at PHENIX RHIC and SPD NICA

Abstract

We study the transverse single-spin asymmetry (TSSA) in $p^{\uparrow }p\to J/\psi X$ reaction, incorporating both transverse-momentum and spin effects. To predict production cross section of prompt $J/\psi$ we use two different approaches, the non-relativistic QCD (NRQCD) factorization approach and the Improved Color Evaporation Model (ICEM), and show how the predicted results for TSSAs depend on choice of hadronization model. For initial-state factorization we consider two models: the standard Generalized Parton Model (GPM) and the Colour Gauge-Invariant version of it (CGI-GPM). We demonstrate that PHENIX collaboration data on TSSA in the process $p^{\uparrow }p\to J/\psi X$ constrain the gluon Sivers function of the proton and rule-out one of existing parameterizations. Estimates for the TSSAs in $p^{\uparrow }p\to J/\psi X$ process for the conditions of the future SPD NICA experiment are presented for the first time.

19 pages, 7 figures

References in corpus (7)

• Big-Bang Nucleosynthesis
• Quarkonium Production in an Improved Color Evaporation Model
• Charmonium Production at High Energy in the k_T-Factorization Approach
• Process dependent Sivers function and implications for single spin asymmetry in inclusive hadron production
• Spin Physics Experiments at NICA-SPD with polarized proton and deuteron beams
• Conceptual design of the Spin Physics Detector
• Process dependence of the gluon Sivers function in $p^{\uparrow }p\to J/\psi +X$ within a TMD approach in NRQCD

Cited by in corpus (2)

• On transverse single-spin asymmetries in $D$-meson production at the SPD NICA experiment
• Probing Gluons at the Spin Physics Detector