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

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arxiv 1810.10685 v1 pith:ZT2JQKRU submitted 2018-10-25 hep-ph nucl-th

classification hep-phnucl-th
keywords collisionsphotoproductionhadronicnon-single-diffractivecoherentcontributioninteractionsobserved
verification ladder T0 review T1 audit T2 compute T3 formal
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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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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing Gluon Shadowing in Heavy Nuclei through Bayesian Reweighting of J/$\psi$ Photoproduction in Ultra-Peripheral Collisions

    hep-ph 2025-02 conditional novelty 5.0 of 10

    Bayesian reweighting of nuclear parton distributions with coherent J/psi photoproduction data yields a lead gluon modification factor of about 0.60 at x=1e-4, implying strong gluon shadowing.

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