Diffractive Scattering Factorization from J/ψ and γ Associated Production in HERA ep Collisions  

作　　者：YAN Zhan-Yuan DUAN Chun-Gui 

机构地区：[1]Department of Physics, North China Electric Power University, Baoding 071003, China Department of Physics, Hebei Teachers'' University, Shijiazhuang 050016, China [2]CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China

出　　处：《Communications in Theoretical Physics》2002年第5期583-586,共4页理论物理通讯（英文版）

基　　金：High Energy Particle-Nuclear Interaction，国家自然科学基金，the Youth Foundation of North China Electric Powe，华北电力大学校科研和教改项目

摘　　要：Using three sets of Pomeron structure functions, the cross sections of J/ψ and γ associated productionvia resolved photon and proton diffractive scatting in ep collision are investigated. It is found that the cross sectionscalculated with various gluon distribution functions of Pomeron are different. The discrepancy is about 1.8 times fordifferential cross sections and 1.7 times for total cross sections. The experimental studies of the process could give valuableinsight in the diffractive production mechanism and test the color-octet mechanism for heavy quarkonium production ina new environment.Using three sets of Pomeron structure functions, the cross sections of J/ψ and γ associated production via resolved photon and proton diffractive scatting in ep collision are investigated. It is found that the cross sections calculated with various gluon distribution functions of Pomeron are different. The discrepancy is about 1.8 times for differential cross sections and 1.7 times for total cross sections. The experimental studies of the process could give valuable insight in the diffractive production mechanism and test the color-octet mechanism for heavy quarkonium production in a new environment.

关 键 词：高能物理 强子-强子碰撞 J/ψ介子 

分 类 号：O572.243[理学—粒子物理与原子核物理]