Photoproduction of J/ψ in non-single-diffractive p+p collisions

被引：0
|
作者：
曹泽华 [1 ,2 ]
阮丽娟 [3 ]
唐泽波 [1 ,2 ]
许长补 [3 ,4 ]
杨驰 [4 ]
杨帅 [3 ]
查王妹 [1 ,2 ]
机构：
[1] State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China
[2] Department of Modern Physics University of Science and Technology of China
[3] Brookhaven National Laboratory
[4] Shandong University
来源：
Chinese Physics C | 2019年 / 06期
基金：
中国国家自然科学基金;
关键词：
photoproduction; jpsi; RHIC; LHC;
D O I：
暂无
中图分类号：
O571.6 [重离子核物理];
学科分类号：
0827 ; 082701 ;
摘要：
Significant enhancements of J/ψ production at very low transverse momenta were recently observed by the ALICE and STAR collaborations in peripheral hadronic A+A collisions. The anomalous excess points to coherent photon-nucleus interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. Assuming that the coherent photoproduction is the underlying mechanism responsible for the excess observed in peripheral A+A collisions, its contribution in p+p collisions with nuclear overlap, i.e. nonsingle-diffractive collisions, is of particular interest. In this paper, we perform a calculation of exclusive J/ψ photoproduction in non-single-diffractive p+p collisions at the RHIC and LHC energies based on the pQCD motivated parametrization using the world-wide experimental data, which could be further employed to improve the precision of the phenomenological calculations for photoproduction in A+A collisions. The differential rapidity and transverse momentum distributions of J/ψ from photoproduction are presented. In comparison with the J/ψ production from hadronic interactions, we find that the contribution of photoproduction is negligible.
引用
收藏
页码：42 / 48
页数：7
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