摘要
The exclusive photoproduction of vector mesons(J/ψ/andφ)is investigated by considering the next-toleading order corrections in the framework of the color glass condensate.We compare the next-to-leading order modified dipole amplitude with the HERA data,finding a good agreement.Our studies show that theχ~2/d.o.f from the leading order,running coupling,and collinearly improved next-to-leading order dipole amplitudes are 2.159,1.097,and 0.932 for the elastic cross-section,and 2.056,1.449,and 1.357 for the differential cross-section,respectively.The results indicate that the higher-order corrections contribute significantly to the vector meson productions,and the description of the experimental data is dramatically improved once the higher order corrections are included.We extend the next-to-leading order exclusive vector meson production model to LHC energies using the same parameters obtained from HERA.We find that our model provides a rather good description of the J/ψandΦdata in proton-proton collisions at 7 TeV and 13 TeV in LHCb experiments.
作者
Yanbing Cai
Wenchang Xiang
Mengliang Wang
Daicui Zhou
蔡燕兵;向文昌;王梦亮;周代翠(Guizhou Key Laboratory in Physics and Related Areas,Guizhou University of Finance and Economics,Guiyang 550025,China;Department of Physics,Guizhou University,Guiyang 550025,China;Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics,Central China Normal University,Wuhan 430079,China)
基金
Supported by the National Natural Science Foundation of China(11765005,11947119,11305040,11847152,11775097)
the Fund of Science and Technology Department of Guizhou Province([2018]1023,[2019]5653)
the Education Department of Guizhou Province(KY[2017]004)
Qian Kehe Platform Talents([2017]5736-027)
the National key research and development program of China(2018YFE0104700,CCNU18ZDPY04)
the 2018 scientific research startup foundation for the introduced talent of Guizhou University of Finance and Economics(2018YJ60)。
