Coherent photoproduction of vector mesons in ultraperipheral heavy ion collisions: Update for run 2 at the CERN Large Hadron Collider

被引：52
作者：
Guzey, V. [1 ]
Kryshen, E. [1 ]
Zhalov, M. [1 ]
机构：
[1] Kurchatov Inst, Natl Res Ctr, PNPI, Gatchina 188300, Russia
来源：
PHYSICAL REVIEW C | 2016年 / 93卷 / 05期
关键词：
PB-PB COLLISIONS; J/PSI PHOTOPRODUCTION; GLUON; DEPENDENCE; PROTONS;
D O I：
10.1103/PhysRevC.93.055206
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We make predictions for the cross sections of coherent photoproduction of rho, phi, J/psi, psi(2S), and Upsilon(1S) mesons in Pb-Pb ultraperipheral collisions (UPCs) at root s(NN) = 5.02 TeV in the kinematics of run 2 at the Large Hadron Collider extending the approaches successfully describing the available Pb-Pb UPC data at root s(NN) = 2.76 TeV. Our results illustrate the important roles of hadronic fluctuations of the photon and inelastic nuclear shadowing in photoproduction of light vector mesons on nuclei and the large leading twist nuclear gluon shadowing in photoproduction of quarkonia on nuclei. We show that the ratio of psi(2S) and J/psi photoproduction cross sections in Pb-Pb UPCs is largely determined by the ratio of these cross sections on the proton. We also argue that UPCs with electromagnetic excitations of the colliding ions followed by the forward neutron emission allows one to significantly increase the range of photon energies accessed in vector meson photoproduction on nuclei.
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页数：9
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