标题： 电子-离子对撞机中e+A碰撞的中心性定义 显示英文标题

标题： Centrality definition in e+A collisions at the Electron-Ion Collider

摘要： 在本工作中，我们通过检查碰撞参数与多个可观测量之间的相关性，包括总能量、总横向动量和总粒子数，研究在电子-离子对撞机（EIC）中定义中心性的可行性。 使用BeAGLE蒙特卡罗生成器，我们在不同能量下模拟e+Au和e+Ru碰撞，并分析碰撞参数与这些可观测量在不同动量范围内的相关性。 我们的研究结果表明，在中央快度区域相关性较弱，但在前向和远前向快度区域相关性更强。 然而，相关性并不足够稳健，无法实现精确的中心性确定。 我们得出结论，在电子-离子碰撞中定义中心性比在离子-离子碰撞中更具挑战性，需要进一步研究以开发适用于EIC的稳健中心性定义。 显示英文摘要

摘要： In this work, we investigate the feasibility of defining centrality in electron-ion collisions at the Electron-Ion Collider (EIC) by examining the correlation between the impact parameter and several observables, including total energy, total transverse momentum, and total number of particles. Using the BeAGLE Monte Carlo generator, we simulate e+Au and e+Ru collisions at different energies and analyze the correlation between the impact parameter and these observables across different kinematic regions. Our findings indicate that the correlation is weak in the central rapidity region but becomes stronger in the forward and far-forward rapidity regions. However, the correlation is not sufficiently robust to allow for precise centrality determination. We conclude that defining centrality in electron-ion collisions is more challenging than in ion-ion collisions, necessitating further studies to develop a robust centrality definition for the EIC.