Photoproduction of C-even quarkonia at EIC and EicC

Abstract

The ${\eta }_c$ photoproduction in $ep$ collision has long been proposed as an ideal process to probe the existence of odderon. In the current work, we systematically investigate the photoproduction of various $C$-even heavy quarkonia (exemplified by ${\eta }_{c(b)}$, and ${\chi }_{c(b)J}$ with $J=0,1,2$) via one-photon exchange channel, at the lowest order in ${\alpha }_s$ and heavy quark velocity in the context of NRQCD factorization. We find that the photoproduction rates of the $C$-even quarkonia through this mechanism are comparable in magnitude with that through the odderon-initiated mechanism, even in the Regge limit ($s\gg -t$), though the latter types of predictions suffers from considerable theoretical uncertainties. The future measurements of these types of quarkonium photoproduction processes in \texttt{EIC} and \texttt{EicC} are crucial to ascertain which mechanism plays the dominant role.

16 pages, 9 figures

References in corpus (3)

• Proton and neutron electromagnetic form factors and uncertainties
• QCD Analysis of Near-Threshold Photon-Proton Production of Heavy Quarkonium
• ${\eta }_c$ production in photon - induced interactions at the AFTER@LHC experiment as a probe of the Odderon

Cited by in corpus (5)

• Photon-Odderon interference in exclusive ${\chi }_c$ charmonium production at the Electron-Ion Collider
• Threshold photoproduction of ${\eta }_c$ and ${\eta }_b$ using holographic QCD
• Photo-production of ${\eta }_{c,b}$ near Threshold
• Exclusive Charmonium Production at the Electron-ion collider in China
• XYZ spectroscopy at electron-hadron facilities III: Semi-inclusive processes with vector exchanges