标题： 校正重离子碰撞中轻核团的介质效应 显示英文标题

标题： Calibrating the medium effects of light clusters in heavy-ion collisions

摘要： 我们提出了一种贝叶斯推理估计，在中央$^{136,124}$Xe$+^{124,112}$Sn 碰撞的选定样本中，通过 INDRA 装置测量的轻核多重性所反映的介质中团簇自能的在介质内修改。数据使用相对论准粒子团簇方法在平均场近似下进行解释，模型的热参数没有任何先验假设。对于 H 和 He 同位素的多重性得到了很好的再现，并且找到了未知热参数的相容后验分布。我们得出结论，团簇-$\sigma$-介子耦合随温度变化而变化，在温度升高时变得更弱，这与微观量子统计计算一致。这意味着轻团簇丰度随温度降低得比以前估计的更快。 显示英文摘要

摘要： We propose a Bayesian inference estimation of in-medium modification of the cluster self-energies from light nuclei multiplicities measured in selected samples of central $^{136,124}$Xe$+^{124,112}$Sn collisions with the INDRA apparatus. The data are interpreted with a relativistic quasi-particle cluster approach in the mean-field approximation without any prior assumption on the thermal parameters of the model. An excellent reproduction is obtained for H and He isotope multiplicities, and compatible posterior distributions are found for the unknown thermal parameters. We conclude that the cluster-$\sigma$-meson coupling is temperature dependent, becoming weaker when the temperature increases, in agreement with microscopic quantum statistical calculations. This implies a faster decrease of the light cluster abundances with temperature than previously estimated.