Coherent photoproduction of J/&psi; and &Upsilon; mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributions

Qiang Fu; Xurong Chen

doi:10.1088/1674-1137/41/11/114105

Chinese Physics C> 2017, Vol. 41> Issue(11) : 114105 DOI: 10.1088/1674-1137/41/11/114105

Coherent photoproduction of J/ψ and Υ mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributions

Qiang Fu ^1,2,3,, ,
Xurong Chen ^1,,

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
2.
Lanzhou University, Lanzhou 730000, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

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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.
- vector meson photoproduction ,
- ultra-peripheral collision ,
- gluon ,
- nuclear modification

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Qiang Fu and Xurong Chen. Coherent photoproduction of J/ψ and Υ mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributions[J]. Chinese Physics C, 2017, 41(11): 114105. doi: 10.1088/1674-1137/41/11/114105

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Received: 2017-06-29

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Supported by Key Research Program of Frontier Sciences, CAS, under the Grants Number NO. QYZDY-SSW-SLH006 of Chinese Academy of Sciences

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沈阳化工大学材料科学与工程学院沈阳 110142

Coherent photoproduction of J/ψ and Υ mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributions

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Coherent photoproduction of J/ψ and Υ mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributions

Corresponding author: Qiang Fu,

Corresponding author: Xurong Chen,

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