Production of High- p _T Kaon and Pion in pp and Au–Au Collisions by Resolved Photoproduction Processes

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.