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arXiv · 2407.02307

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

Tiago Custódio·Alex Rebillard-Soulié·Rémi Bougault·Diego Gruyer·Francesca Gulminelli·Tuhin Malik·Helena Pais·Constança Providência
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Abstract

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-$σ$-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.

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Tiago Custódio, Alex Rebillard-Soulié, Rémi Bougault, Diego Gruyer, Francesca Gulminelli, Tuhin Malik, Helena Pais, Constança Providência. 2025-01-31. Calibrating the medium effects of light clusters in heavy-ion collisions. https://arxiv.org/abs/2407.02307

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