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arXiv · 2403.02097

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

Luca Maxia·Feng Yuan
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Abstract

By investigating the soft gluon radiation in the $J/ψ$ 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 $\cos(ϕ)$ 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 $\cos(ϕ)$ and $\cos(2ϕ)$ asymmetries employing both the color-singlet model and the nonrelativistic QCD approach are presented for typical kinematics at the future EIC.

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Luca Maxia, Feng Yuan. 2025-01-07. Azimuthal angular correlation of $J/ψ$ plus jet production at the electron-ion collider. https://doi.org/10.1103/physrevd.110.114042

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