EPJ Web of Conferences
Volume 90, 2015XLIV International Symposium on Multiparticle Dynamics (ISMD 2014)
|Number of page(s)||6|
|Section||Forward physics and diffraction|
|Published online||24 March 2015|
Charmonium photoproduction in ultra-peripheral p-Pb and Pb-Pb collisions with ALICE at the LHC
1 Centro Studi e Ricerche e Museo Storico della Fisica “Enrico Fermi”, Rome, Italy
2 Salerno INFN, Complesso Universitario di Monte Sant’Angelo Via Cintia, Napoli, Italy
a e-mail: firstname.lastname@example.org
Published online: 24 March 2015
The photoproduction of vector mesons in Ultra-Peripheral Collisions (UPC) is a powerful tool to probe the nuclear gluon distribution (Pb-Pb collisions) and the gluon structure function in the proton (p-Pb collisions). The first measurements of coherent photoproduced J/ψ and ψ(2S) in Pb-Pb collisions at √sNN = 2.76 TeV, performed with the ALICE detector, are described and compared to STARLIGHT and QCD based models, in order to investigate nuclear gluon shadowing. The results of the measurement of exclusive J/ψ photoproduction off protons in p-Pb collisions at √sNN = 5.02 TeV are also presented.
© Owned by the authors, published by EDP Sciences, 2015
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