中文摘要：

基于微扰量子色动力学计算了相对论重离子碰撞中的Ks^0和Λ的横向动量谱。发现初态部分子产生过程是主要的,光生过程的贡献在LHC能量是明显的。通过考虑光生过程,理论计算能够较好描述实验数据。数值计算结果表明,在相对论重离子碰撞中光生过程对Ks^0和Λ的修正是不可忽略的。

英文摘要：

The transverse momentum spectrum of Ks^0 and Λ in relativistic heavy-ion collisions is calculated based on perturbative quantum chromodynamics. It is found that the initial parton production processes are prominent and the contribution of photoproduction processes is evident at LHC energies.By taking into account the photoproduction processes, the theoretical simulations could give nice descriptions of experimental data. The numerical results indicate that the modification of photoproduction processes of Ks^0and Λ cannot be negligible in relativistic heavy-ion collisions.