Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV

Abstract

We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p+p$ collisions at $\sqrt{s}=200$ GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges $1.2<|y|<2.2$ and $|y|<0.35$ for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$, with a value of $-0.086\pm 0.026^{\mathrm{stat}}\pm 0.003^{\mathrm{syst}}$ in the forward region. This result suggests possible nonzero trigluon correlation functions in transversely polarized protons and, if well defined in this reaction, a nonzero gluon Sivers distribution function.

431 authors from 62 institutions, 13 pages, 5 figures, and 5 tables. Submitted to Physical Review D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

References in corpus (11)

• A Unified Picture for Single Transverse-Spin Asymmetries in Hard Processes
• J/psi Production vs Transverse Momentum and Rapidity in p+p Collisions at sqrt(s) = 200 GeV
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV
• Single Transverse Spin Asymmetries of Identified Charged Hadrons in Polarized p+p Collisions at $\sqrt{s}$ = 62.4 GeV
• Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs
• Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
• Single transverse-spin asymmetry for $D$-meson production in semi-inclusive deep inelastic scattering
• Evidence for the Absence of Gluon Orbital Angular Momentum in the Nucleon
• Constraints on the gluon Sivers distribution via transverse single spin asymmetries at midrapidity in p(transv. polarized) p -> pi^0 X processes at BNL RHIC
• Single Spin Asymmetries in Heavy Quark and Antiquark Productions

Cited by in corpus (6)

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• Conceptual design of the Spin Physics Detector
• Spin physics and TMD studies at A Fixed-Target ExpeRiment at the LHC (AFTER@LHC)
• Prospects for quarkonium studies at the high-luminosity LHC
• Hard- and soft-fermion-pole contributions to single transverse-spin asymmetry for Drell-Yan process