Jul 5 – 12, 2017
Venice, Italy
Europe/Zurich timezone
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Measurements of vector meson photoproduction with ALICE in ultra-peripheral Pb-Pb collisions at sqrt(sNN) = 5.02 TeV

Jul 6, 2017, 6:15 PM
Room Mangano (Palazzo del Casinò)

Room Mangano

Palazzo del Casinò

Parallel Talk Heavy Ion Physics Heavy ion physics


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


The intense photon fluxes of relativistic nuclei provide a possibility
to study photonuclear and two-photon interactions in ultra-peripheral collisions (UPC)
where the nuclei do not overlap and no strong nuclear interactions occur.
The study of such collisions provides information about the initial state of nuclei (nPDF).

Exclusive $J/\psi$ production in UPC which is sensitive to the nuclear
gluon distribution: first ALICE results from LHC Run 2 will be presented for
this channel for both forward and mid-rapidity $J/\psi$. The increased statistics
and the higher collision energy allows for a more detailed study of lower values of Bjorken-x.

The analysis of the $\gamma+A \rightarrow \rho^0$+A process in UPC is a tool to test the, so-called, black disk regime
where the target nucleus appears like a black disk and the total $\rho^0$+A cross section reaches it quantum mechanical limit.
ALICE reports new measurements of $\rho^0$ photoproduction cross sections in Pb-Pb UPC at $\sqrt{s_{NN}}=5.02$ TeV
at mid-rapidity which are compared to predictions.

Experimental Collaboration ALICE Collaboration

Primary author

Presentation materials