Single Spin Asymmetry in Charmonium Production

Abstract

We present estimates of Single Spin Asymmetry (SSA) in the electroproduction of $J/\psi$ taking into account the transverse momentum dependent (TMD) evolution of the gluon Sivers function and using Color Evaporation Model of charmonium production. We estimate SSA for JLab, HERMES, COMPASS and eRHIC energies using recent parameters for the quark Sivers functions which are fitted using an evolution kernel in which the perturbative part is resummed up to next-to-leading logarithms (NLL) accuracy. We find that these SSAs are much smaller as compared to our first estimates obtained using DGLAP evolution but are comparable to our estimates obtained using TMD evolution where we had used approximate analytical solution of the TMD evolution equation for the purpose.

arXiv commentConference proceedings of Light Cone 2014 at Raleigh, NC, USA. Talk presented by Prof. Anuradha Misra. arXiv admin note: text overlap with arXiv:1411.0832

References in corpus (13)

• TMD Parton Distribution and Fragmentation Functions with QCD Evolution
• Sivers Effect for Pion and Kaon Production in Semi-Inclusive Deep Inelastic Scattering
• QCD Evolution of the Sivers Asymmetry
• Single transverse-spin asymmetry in high transverse momentum pion production in pp collisions
• The QCD Evolution of the Sivers Function
• A strategy towards the extraction of the Sivers function with TMD evolution
• Asymmetric jet correlations in p p^\uparrow scattering
• QCD Resummation for Single Spin Asymmetries
• Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
• Sivers effect in Drell Yan at RHIC
• Sivers Effect and Transverse Single Spin Asymmetry in $e+p^{\uparrow }\to e+J/\psi +X$
• Transverse Single Spin Asymmetry in $e+p^{\uparrow }\to e+J/\psi +X$ and Transverse Momentum Dependent Evolution of the Sivers Function
• Transverse Single Spin Asymmetry in $e+p^{\uparrow }\to e+J/\psi +X$ and $Q^2$ -evolution of Sivers Function-II