Azimuthal angular correlation of $J/\psi$ plus jet production at the electron-ion collider

Abstract

By investigating the soft gluon radiation in the $J/\psi$ plus jet photoproduction at the electron-ion collider (EIC), we demonstrate that the azimuthal angular correlations between the leading jet and heavy quarkonium provide a unique probe to the production mechanism of the latter. In particular, a significant $\cos (\varphi )$ asymmetry is found for the color-singlet channel, whereas it vanishes or has an opposite sign for color-octet production, depending on the jet transverse momentum. Numerical results of $\cos (\varphi )$ and $\cos (2\varphi )$ asymmetries employing both the color-singlet model and the nonrelativistic QCD approach are presented for typical kinematics at the future EIC.

arXiv comment14 pages, 13 figures, 1 table

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Cited by in corpus (1)

• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED