标题： RHIC $\sqrt{s_{NN}}=200$ GeV 强子产额与同位旋依赖的物态方程 显示英文标题

标题： RHIC $\sqrt{s_{NN}}=200$ GeV hadron yields and the isospin dependent equation of state

摘要： 统计强子化模型在重离子碰撞的化学冻结过程中提取信息方面取得了成功。 在RHIC，碰撞能量为$\sqrt{s_{NN}}=200$GeV 时，已使用了许多不同的离子种类进行$A$+$A$碰撞。 这使得可以扫描电荷分数$Y_Q=Z/A$，其中$Z$是质子数，$A$是重子数。 我们首先对尚未有发表的强子产额比实验数据的$A$+$A$碰撞做出预测（O+O，Ru+Ru，Zr+Zr）。 然后，我们利用实验和预测的产额比，在$Y_Q$上进行热拟合，从而提取化学冻结点处的$s/n_B$和其他热力学信息。 通过$s/n_B$和$Y_Q$之间的关系，我们可以计算有限密度下有限温度状态方程的新约束条件。 我们讨论了该约束条件的意义，并提出了未来可能有助于连接与中子星合并相关的状态方程的运行方案。 显示英文摘要

摘要： The statistical hadronization model has been successful in extracting information at chemical freeze-out in heavy-ion collisions. At RHIC, with a collision energy of $\sqrt{s_{NN}}=200$ GeV, many different ion species have been used for $A$+$A$ collisions. This allows for a scan across the charge fraction $Y_Q=Z/A$, where $Z$ is the proton number and $A$ is the baryon number. We first make predictions for $A$+$A$ collisions that do not yet have published experimental data on hadron yield ratios (O+O, Ru+Ru, Zr+Zr). We then use both the experimental and predicted yield ratios to perform thermal fits across $Y_Q$, enabling us to extract $s/n_B$ and other thermodynamic information at chemical freeze-out. Using the relation between $s/n_B$ and $Y_Q$, we can calculate a new constraint on the finite temperature equation of state at finite densities. We discuss implications of this constraint and propose future runs that can help connect to the equation of state relevant for neutron star mergers.