Photoproduction of J/$\psi$ in non-single-diffractive p+p collisions

Abstract

Recently, significant enhancements of J/$\psi$ production at very low transverse momenta were observed by the ALICE and STAR collaboration in peripheral hadronic A+A collisions. The anomaly excesses point to evidence of coherent photon-nucleus interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. Assuming that the coherent photoproduction is the underlying mechanism which is responsible for the excess observed in peripheral A+A collisions, its contribution in p+p collisions with nuclear overlap, i.e. non-single-diffractive collisions, is of particular interest. In this paper, we perform a calculation of exclusive J/$\psi$ photoproduction in non-single-diffractive p+p collisions at RHIC and LHC energies base on the pQCD motivated parametrization from world-wide experimental data, which could be further employed to improve the precision of phenomenal calculations for photoproduction in A+A collisions. The differential rapidity and transverse momentum distributions of J/$\psi$ from photoproduction are presented. In comparison with the J/$\psi$ production from hadronic interactions, we find that the contribution of photoproduction is negligible.

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Cited by in corpus (4)

• Measurement of exclusive $J/\psi$ and $\psi (2S)$ production at $\sqrt{s}=13$ TeV
• Exclusive J/$\psi$ Detection and Physics with ECCE
• Exclusive Charmonium Production at the Electron-ion collider in China
• The effect of initial nuclear deformation on dielectron photoproduction in hadronic heavy-ion collisions