Charmonium photoproduction in ultra-peripheral p-Pb and Pb-Pb collisions with ALICE at the LHC

被引：0
作者：
De Gruttola, D. [1 ,2 ,3 ]
机构：
[1] Ctr Studi & Ric, Rome, Italy
[2] Museo Stor Fis Enrico Fermi, Rome, Italy
[3] Complesso Univ Monte St Angelo, Salerno INFN, Naples, Italy
来源：
XLIV INTERNATIONAL SYMPOSIUM ON MULTIPARTICLE DYNAMICS (ISMD 2014) | 2015年 / 90卷
关键词：
J/PSI MESONS; ELECTROPRODUCTION; PHYSICS;
D O I：
10.1051/epjconf/20159006005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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/psi and psi(2S) in Pb-Pb collisions at root S-NN = 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/psi photoproduction off protons in p-Pb collisions at root S-NN = 5.02 TeV are also presented.
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