Production of High-p_T Kaon and Pion in PP and Au-Au Collisions by Resolved Photoproduction Processes  

作　　者：蔡燕兵 杨海涛 李云德 

机构地区：[1]Department of Physics, Yunnan University, Kunming 650091 [2]School of Physics and Electronic Information Engineering, Zhaotong University, Zhaotong 657000

出　　处：《Chinese Physics Letters》2015年第8期44-47,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11065010 and 11465021

摘　　要：Taking into account the effects of shadowing and jet quenching, the large transverse momentum distribution of K＋, π＋ and K＋/π＋ ratios at s = 200 GeV originating from resolved photoproduction processes is calculated based on perturbative quantum chromodynamics. It is found that the contribution of K＋ and π＋ produced by photoproduction processes is evident. The K＋ /π＋ ratios in Au-Au collisions show an obvious enhancement compared with p p collisions. The numerical results indicate that the photoproduetion processes are good modification for kaon and pion production.Taking into account the effects of shadowing and jet quenching, the large transverse momentum distribution of K＋, π＋ and K＋/π＋ ratios at s = 200 GeV originating from resolved photoproduction processes is calculated based on perturbative quantum chromodynamics. It is found that the contribution of K＋ and π＋ produced by photoproduction processes is evident. The K＋ /π＋ ratios in Au-Au collisions show an obvious enhancement compared with p p collisions. The numerical results indicate that the photoproduetion processes are good modification for kaon and pion production.

关 键 词：Production of High-p_T Kaon and Pion in PP and Au-Au Collisions by Resolved Photoproduction Processes 

分 类 号：O572.33[理学—粒子物理与原子核物理] O313.4[理学—物理]