Nucleon dissociation and incoherent J/ψ photoproduction on nuclei in ion ultraperipheral collisions at the CERN Large Hadron Collider

Guzey, V. (Department of Physics, University of Jyväskylä, P.O. Box 35, 40014 University of Jyväskylä, Finland) (Helsinki Institute of Physics, P.O. Box 64, 00014 University of Helsinki, Finland) (National Research Center “Kurchatov Institute,” Petersburg Nuclear Physics Institute (PNPI), Gatchina 188300, Russia) ; Strikman, M. (Department of Physics, The Pennsylvania State University, State College, Pennsylvania 16802, USA) ; Zhalov, M. (National Research Center “Kurchatov Institute,” Petersburg Nuclear Physics Institute (PNPI), Gatchina 188300, Russia)

11 January 2019

Abstract: Using the general notion of cross section fluctuations in hadron-nucleus scattering at high energies, we derive an expression for the cross section of incoherent J/ψ photoproduction on heavy nuclei dσγAJ/ψY/dt, which includes both elastic dσγpJ/ψp/dt and proton-dissociation dσγpJ/ψY/dt photoproduction on target nucleons. We find that, with good accuracy, dσγAJ/ψY/dt can be expressed as a product of the sum of the dσγpJ/ψp/dt and dσγpJ/ψY/dt cross sections, which have been measured at HERA, and the common nuclear shadowing factor, which is calculated using the leading twist nuclear shadowing model. Our prediction for the cross section of incoherent J/ψ photoproduction in Pb-Pb ultraperipheral collisions at sNN=2.76TeV and y=0,dσAAJ/ψAY(y=0)/dy=0.591.24mb agrees within significant theoretical uncertainties with the data of the ALICE Collaboration.


Published in: Physical Review C 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevC.99.015201
arXiv: 1808.00740
License: CC-BY-4.0



Back to search

Fulltext:
Download fulltextXML Download fulltextPDF