Jan 10 – 14, 2022
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Vector meson photoproduction at the LHC with ALICE

Jan 10, 2022, 4:19 PM
1m
Online only

Online only

Poster Standard Model Precision SM Measurements

Speaker

Valeri Pozdniakov (Joint Institute for Nuclear Research (RU))

Description

Photonuclear interactions dominate the interaction rate at large impact
parameters of the colliding heavy ions via ultra-peripheral collisions
(UPC). These processes allow us to study an evolution of the gluon
content of protons and nuclei in new kinematic regime at the LHC.

The study of J/psi production allows for perturbative QCD considerations
which address the gluon saturation and nuclear shadowing. Results on J/psi
photoproduction cross sections both at forward and midrapidities are presented.
The measurements are compared with available models for better understanding
of QCD in this shadowing regime.

The light-meson photonuclear production in UPC at the LHC
approaches the black-disk limit of QCD. The cross sections of the
\rho^0 coherent photoproduction in Pb--Pb and Xe--Xe UPC were
measured for different nuclear-breakup classes. The results are
compared with model predictions.

Primary author

Valeri Pozdniakov (Joint Institute for Nuclear Research (RU))

Presentation materials