Production of High-pT Kaon and Pion in pp and Au–Au Collisions by Resolved Photoproduction Processes
CAI Yan-Bing1, YANG Hai-Tao2, LI Yun-De1**
1Department of Physics, Yunnan University, Kunming 650091 2School of Physics and Electronic Information Engineering, Zhaotong University, Zhaotong 657000
Abstract：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 photoproduction processes are good modification for kaon and pion production.
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
. [J]. 中国物理快报, 2015, 32(08): 81201-081201.
CAI Yan-Bing, YANG Hai-Tao, LI Yun-De. Production of High-pT Kaon and Pion in pp and Au–Au Collisions by Resolved Photoproduction Processes. Chin. Phys. Lett., 2015, 32(08): 81201-081201.
2015, Vol. 32 
