Gluon densities at small x from photoproduction of ψ(2S) mesons in ultraperipheral collisions at the LHC

• Published in: Bulletin of the Russian Academy of Sciences. Physics Vol. 80; no. 8; pp. 970 - 976
• Main Authors: Guzey, V. A., Zhalov, M. B.
• Format: Journal Article
• Language: English
• Published: New York Allerton Press 01-08-2016; Springer Nature B.V
• Subjects: Collisions; Femto- and Nanotechnologies” (LXV International Meeting on Nuclear Spectroscopy and Nuclear Structure) (St. Petersburg; Hadrons; Heavy Ions; June–July 201; Large Hadron Collider; Mesons; Nuclear Engineering; Nuclear Physics; Nuclei (nuclear physics); Photoproduction; Physics; Physics and Astronomy; Proceedings of the LXV International Conference “Nucleus 2015. New Horizons in Nuclear Physics
• ISSN: 1062-8738; 1934-9432
• DOI: 10.3103/S1062873816080190

In the framework of the leading order of perturbative QCD, we study exclusive photoproduction of ψ(2
S
) mesons in ultraperipheral proton-proton and nucleus-nucleus collisions at the LHC. We calculate the charmonium rapidity distributions and show that the analysis of the LHC experimental data allows one to significantly reduce uncertainties in the behavior of the gluon densities of the proton and nuclei at small
x
.