Photoproduction of J/ψ in non-single-diffractive p+p collisions |
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引用本文: | 曹泽华,阮丽娟,唐泽波,许长补,杨驰,杨帅,查王妹.Photoproduction of J/ψ in non-single-diffractive p+p collisions[J].中国物理C(英文版),2019(6):38-44. |
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作者姓名: | 曹泽华 阮丽娟 唐泽波 许长补 杨驰 杨帅 查王妹 |
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基金项目: | Supported by the National Natural Science Foundation of China(11775213,11505180,11675168);the U.S.DOE Office of Science(DE-SC0012704);MOST(2016YFE0104800) |
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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.
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关 键 词: | PHOTOPRODUCTION jpsi RHIC LHC |
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