Coherent photoproduction of J/ψ and ϒ mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributionsSupported by Key Research Program of Frontier Sciences, CAS, under the Grants Number NO. QYZDY-SSW-SLH006 of Chinese Academy of Sciences

Fu, Qiang (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China) (Lanzhou University, Lanzhou 730000, China) (University of Chinese Academy of Sciences, Beijing 100049, China) ; Chen, Xurong (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China)

24 October 2017

Abstract: We present calculations of coherent photoproduction of vector mesons (J/ψ and ϒ) with leading-order parton distribution functions to check new kinds of corrections of the DGLAP equations and nuclear modifications. The input gluon distribution of the proton is the dynamical parton model from the DGLAP equations with GLR-MQ-ZRS (Gribov-Levin-Ryskin, Mueller-Qiu, Zhu-Ruan-Shen) modifications. From comparison between several other gluon distribution models, we find that the dynamical gluon distribution fits with the results of meson photoproduction experiments in the high energy region. The calculation of the differential cross sections using dynamical and other gluon distributions is compared with the experimental data from the HERA, ZEUS and LHCb Collaborations. Although there is little data for the rapidity distribution of vector meson photoproduction near zero rapidity, the dynamical gluon distribution works well with the data in the large rapidity region.


Published in: Chinese Phys. C 41 (2017) 114105
Published by: Institute of Physics Publishing/Chinese Academy of Sciences
DOI: 10.1088/1674-1137/41/11/114105
arXiv: 1612.01679
License: CC-BY-3.0



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