Using event-by-event fluctuations, we study the diffusion parameters of net-charge, net-pion, net-kaon, and net-proton in the heavy-ion jet interaction generator (HIJING), and ultra-relativistic quantum molecular dynamics (UrQMD) models at different collision energies \(\sqrt{s_{_{NN}}}\) available at BNL Relativistic Heavy Ion Collider (RHIC). The diffusion parameter (\({\sigma }\)) of net-charge and identified particles are estimated in rapidity space at various \(\sqrt{s_{_{NN}}}\). It is observed that, the \({\sigma }\) values are independent of collision energies but emphasises the particle-species dependence of diffusion coefficient in the QGP medium. The present work on particle-species dependence of diffusion coefficient provides a baseline for comparison with the experimental data.

利用逐个事件的涨落，我们研究了重离子射流相互作用发生器（HIJING）中净电荷，净离子，净钾和净质子的扩散参数以及超相对论量子分子动力学（BNL相对论重离子对撞机（RHIC）提供了在不同碰撞能量\（\ sqrt {s _ {_ {_ {NN}}} \）下的UrQMD）模型。净电荷和已识别粒子的扩散参数（\（{\ sigma} \））在各个\（\ sqrt {s _ {_ {_ {NN}}} \）的快速空间中估计。观察到\（{\ sigma} \）值与碰撞能量无关，但强调了QGP介质中扩散系数的颗粒种类依赖性。目前有关扩散系数对粒子种类的依赖性的工作为与实验数据进行比较提供了基线。