Photoproduction of heavy vector mesons in ultra-peripheral Pb-Pb collisions

Abstract

Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impact parameter greater than the sum of their radii, provide information about the initial state of nuclei. In particular, heavy vector meson production, where the particle mass sets a hard scale, proceeds in such collisions by photon-gluon interactions, and gives access to nuclear PDFs. The ALICE collaboration has published measurements of J/psi and psi(2S) photoproduction in ultra-peripheral collisions in LHC Run 1 at forward (J/psi) and mid-rapidity, and has obtained a substantially larger data set in 2015 from LHC Run 2, allowing much more detailed studies of the production mechanism to be performed. In particular, the increased energy and more detailed measurements in the forward region in Run 2 give access to significantly lower values of Bjorken-x than in previous studies. In this talk, the latest available results from Run 2 will be given.

4 pages, 5 figures, XXVIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2017)

References in corpus (4)

• The Physics of Ultraperipheral Collisions at the LHC
• Exclusive J/$\psi$ photoproduction off protons in ultra-peripheral p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• J/Psi production in ultraperipheral Pb+Pb and p+Pb collisions at energies available at the CERN Large Hadron Collider
• Investigation of diffractive photoproduction of $J/\Psi$ in hadronic collisions

Cited by in corpus (10)

• Color dipole predictions for the exclusive vector meson photoproduction in $pp/pPb/PbPb$ collisions at Run 2 LHC energies
• Dilepton Radiation in Heavy-Ion Collisions at Small Transverse Momentum
• Coherent photoproduction of $J/\psi$ in nucleus-nucleus collisions in the color dipole approach
• From the $\gamma \gamma \to p\bar{p}$ reaction to the production of $p\bar{p}$ pairs in ultraperipheral ultrarelativistic heavy-ion collisions at the LHC
• Exclusive photoproduction of excited quarkonia in ultraperipheral collisions
• Heavy quarkonia production at LHC and EIC using Basis Light-Front Quantization wavefunctions
• Inclusive heavy quark photoproduction in $pp$, $pPb$ and $PbPb$ collisions at Run 2 LHC energies
• Momentum transfer squared dependence of exclusive quarkonia photoproduction in UPCs
• Search for muoproduction of the X(3872) at COMPASS
• Hard processes in small systems