J/ψ and γ Photoproduction in Pb-Pb Collisions at Large Hadron Collider

作     者：LIU Lian-shou LI Yun-de 

作者机构：Institute of Particle PhysicsHuazhong Normal UniversityWuhan 430070 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：1996年第13卷第7期

页      面：512-515页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported in part by the National Natural Science Foundation of China 

主　　题：function process fragmentation 

摘      要：Hard photoproduction of J/ψandγat large hadron collider Pb-Pb collisions with center of mass energy 6300AGeV is discussed in the process Pb+Pb→Pb+J/ψ(Γ)+X with three types of equivalent photon spectrum *** turns out that in hard photoproduction the J/ψcross section is dominated by the gluon and heavy quark fragmentation,especially the gluon fragmentation is very important at large pt,while theγcross section is dominated by the leading order *** may be conclude from the result that the hard photoproduction processes can be used to test several important problems such as the gluon distribution in the nucleus,gluon and heavy quark fragmentation of J/ψ,and so *** addition the process also provide a new way of testing the EMC effects.