Sivers asymmetry in the photoproduction of a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> and a jet at the EIC

Abstract

We calculate the Sivers asymmetry in the photoproduction of almost back-to-back $J/\ensuremath{\psi}$-jet pair in the process $e{p}^{\ensuremath{\uparrow}}\ensuremath{\rightarrow}J/\ensuremath{\psi}+\text{jet}+X$, which will be possible at the future planned Electron-Ion Collider (EIC). We use the framework of a generalized parton model and nonrelativistic QCD for calculating the $J/\ensuremath{\psi}$ production rate. We include contributions from both color singlet and color octet states in the asymmetry. We obtain sizable Sivers asymmetry that can be promising to determine the gluon Sivers function. We also investigate the effect of transverse momentum dependent evolution on the asymmetry.

Topics & Concepts