标题： 强子散射效应对相对论重离子碰撞中$ψ(2S)$抑制的影响 显示英文标题

标题： Hadronic scattering effects on $ψ(2S)$ suppression in relativistic heavy-ion collisions

摘要： 在本工作中，我们估算重离子碰撞中$N_{\psi(2S)} / N_{J/\psi}$的产率比，考虑在这些碰撞晚期阶段形成的强子气体中$\psi (2S) $和$J/\psi$状态与轻介子的相互作用。从适当的有效拉格朗日量出发，我们首先计算所提及状态的产生和吸收的热平均截面，然后将它们作为输入用于速率方程，以确定$N_{\psi(2S)}$、$N_{J/\psi}$和$N_{\psi(2S)} / N_{J/\psi}$的时间演化。 我们研究的主要结论是，在强子气体相中，$\psi (2S) $和$J/\psi$的多重性变化不大，而$\psi (2S)$比$J/\psi$更容易被吸收。 获得的最终比例与实验数据定性一致。 显示英文摘要

摘要： In this work we estimate the $N_{\psi(2S)} / N_{J/\psi}$ yield ratio in heavy-ion collisions, considering the interactions of the $\psi (2S) $ and $J/\psi$ states with light mesons in the hadron gas formed at the late stages of these collisions. Starting from the appropriate effective Lagrangians, we first compute the thermally-averaged cross sections for the production and absorption of the mentioned states, and then use them as input in the rate equations to determine the time evolution of $N_{\psi(2S)}$, $N_{J/\psi}$ and $N_{\psi(2S)} / N_{J/\psi}$. The main conclusion of our study is that the $\psi (2S) $ and $J/\psi$ multiplicities do not change much in the hadron gas phase and that the $\psi (2S)$ is more absorbed than the $J/\psi$. The obtained final ratio is in qualitative agreement with experimental data.