Nov 26 – 30, 2018
PUCP
America/Lima timezone
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Coherent J/ψ photo-production in ultra-peripheral Pb-Pb collisions with ALICE at the LHC

Nov 27, 2018, 3:20 PM
15m
Room N101, McGregor Building (PUCP)

Room N101, McGregor Building

PUCP

Parallel Talk (Experiment) Heavy Ions Parallel Talks B

Speaker

Roman Lavicka (Czech Technical University (CZ))

Description

There are several different predictions for the behaviour of the gluon distribution in nuclei at small Bjorken x and experimental data are needed to choose among them. This is achieved by measuring the cross section of processes specially sensitive to this parton distribution.

The high flux of photons from lead ions at the LHC allows us to study photon-induced reactions in ultra-peripheral collisions (UPC) of Pb-Pb nuclei, in particular of those producing a J/ψ meson exclusively. The study of these collisions, where projectiles do not overlap, provides information about the initial state of nuclei.

The newest ALICE results on vector meson photoproduction are presented. The increased statistics and higher collision energy of $\sqrt{s}$=5.02 TeV in Run 2 allow us to put new constraints on available models.

Primary author

Roman Lavicka (Czech Technical University (CZ))

Presentation materials