Orateur
Description
Ultra-peripheral heavy-ion collisions (UPCs) occur when the impact parameter of the collision is greater than the sum of the radii of the colliding nuclei. These collisions allow one to study photon-induced reactions, such as the photoproduction of a vector meson, which is a well-established tool to probe the gluon structure of the colliding nuclei.
This talk will focus on the observation of the azimuthal anisotropy in the
We present the results of the first measurement of this kind at the LHC, using Pb--Pb UPCs and the ALICE detectors. The anisotropy is studied via the distribution of a variable,