Photoproduction of rho-mesons on nuclei in ultraperipheral nuclear collisions at the LHC

Oct 12, 2020, 6:15 PM
25m
Online

Online

Oral report Section 4. Relativistic nuclear physics, elementary particle physics and high-energy physics. Section 4. Relativistic nuclear physics, elementary particle physics and high-energy physics

Speaker

Vadim Guzey (NRC Kurchatov Institute PNPI (RU))

Description

Using the Gribov–Glauber model for photon–nucleus scattering and a generalization of the vector meson dominance (VMD) model for the hadronic structure of the photon, we make predictions for the cross sections of coherent and incoherent photoproduction of rho-mesons in Pb-Pb ultraperipheral collisions (UPCs) at the LHC. We find that the effect of inelastic nuclear shadowing is significant and leads to an additional 40% (25%) suppression of the coherent (incoherent) cross section. Our approach provides a very good description of the ALICE data on coherent rho photoproduction in Pb-Pb UPCs at 2.76 and 5.02 TeV. Comparing our predictions to those of the STARlight Monte-Carlo framework, we observe very significant differences.

Primary authors

Vadim Guzey (NRC Kurchatov Institute PNPI (RU)) Evgeny Kryshen (NRC Kurchatov Institute PNPI (RU)) Dr Michael Zhalov (Petersburg Nuclear Physics Institute (PNPI))

Presentation materials