Transverse Single Spin Asymmetry in $e+p^\uparrow \to e+J/\psi +X $ and Transverse Momentum Dependent Evolution of the Sivers Function

Anuradha Misra; Asmita Mukherjee; Rohini M. Godbole; Vaibhav S. Rawoot

arxiv: 1304.2584 · v3 · pith:D2RMVODQnew · submitted 2013-04-09 · ✦ hep-ph

Transverse Single Spin Asymmetry in e+p^uparrow to e+J/psi +X and Transverse Momentum Dependent Evolution of the Sivers Function

Rohini M. Godbole , Anuradha Misra , Asmita Mukherjee , Vaibhav S. Rawoot This is my paper

classification ✦ hep-ph

keywords evolutiontransverseasymmetryfunctionsiversdependentgluonmomentum

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We extend our analysis of transverse single spin asymmetry (SSA) in electroproduction of $J/\psi$ to include the effect of the scale evolution of the transverse momentum dependent (TMD) parton distribution functions and gluon Sivers function. We estimate SSA for JLab, HERMES, COMPASS, and eRHIC energies using the color evaporation model of charmonium production, using an analytically obtained approximate solution of TMD evolution equations discussed in the literature. We find that there is a reduction in the asymmetry compared with our predictions for the earlier case considered by us, wherein the $Q^2$ dependence came only from DGLAP evolution of the unpolarized gluon densities and a different parametrization of the TMD Sivers function was used.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

The effect of TMD evolution on the Sivers asymmetry in back-to-back $J/\psi+\gamma$ and $J/\psi+\text{jet}$ production at the Electron-Ion-Collider
hep-ph 2026-06 unverdicted novelty 4.0

After including TMD evolution, the Sivers asymmetry in these J/ψ processes at EIC kinematics remains sizable and largely independent of LDME choices, providing a robust probe of the gluon Sivers function.