Photonuclear $J/\psi$ production at the LHC: proton-based versus nuclear dipole scattering amplitudes

Abstract

The coherent photonuclear production of a $J/\psi$ vector meson at the LHC has been computed using two different sets of solutions of the impact-parameter dependent Balitsky-Kovchegov equation. The nuclear dipole scattering amplitudes are obtained either from ($i$) solutions for this process off proton targets coupled with a Glauber-Gribov prescription, or ($ii$) from solutions obtained with an initial condition representing the nucleus. These approaches predict different cross sections, which are compared with existing data from ultra-peripheral collisions at the LHC. The latter approach seems to better describe current measurements. Future LHC data should be precise enough to select one of the two approaches as the correct one.

13 pages, 2 figures

References in corpus (10)

• The Physics of Ultraperipheral Collisions at the LHC
• Resumming double logarithms in the QCD evolution of color dipoles
• Exclusive diffractive processes in electron-ion collisions
• Imaging the nucleus with high-energy photons
• Non-linear evolution in QCD at high-energy beyond leading order
• Color Glass Condensate at next-to-leading order meets HERA data
• Investigation of diffractive photoproduction of $J/\Psi$ in hadronic collisions
• HERA data and collinearly-improved BK dynamics
• Spin rotation effects in diffractive electroproduction of heavy quarkonia
• Predictions for nuclear structure functions from the impact-parameter dependent Balitsky-Kovchegov equation

Cited by in corpus (17)

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• Probing small Bjorken-$x$ nuclear gluonic structure via coherent J/$\psi$ photoproduction in ultraperipheral PbPb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Energy dependence of coherent photonuclear production of J/$\psi$ mesons in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=5.02 TeV
• Overview of high-density QCD studies with the CMS experiment at the LHC
• Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production
• Finite-size effects on small-$x$ evolution and saturation in proton and nuclear targets
• Momentum transfer squared dependence of exclusive quarkonia photoproduction in UPCs
• Global Bayesian Analysis of $\mathrm{J}/\psi$ Photoproduction on Proton and Lead Targets
• Solutions to the Balitsky-Kovchegov equation including the dipole orientation
• Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture
• The energy dependence of exclusive heavy vector meson photoproduction cross-sections and NLO BFKL evolution
• Measurement of coherent exclusive $J/\psi \to {\mu }^{+}{\mu }^{-}$ production in ultraperipheral Pb+Pb collisions at $\sqrt{s_{\text{NN}}}=5.36$ TeV with the ATLAS detector
• Physics with high-luminosity proton-nucleus collisions at the LHC
• First polarisation measurement of coherently photoproduced J/$\psi$ in ultra-peripheral Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Probing nuclear structure with the Balitsky-Kovchegov equation in full impact-parameter dependence