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

2024/07/02 by Custódio, Tiago, Rebillard-Soulié, Alex, Bougault, Rémi +5 · 2 citations
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2407.02307

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 ^136,124Xe+^124,112Sn 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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• Alpha clustering in warm and dense nuclear matter from heavy-ion collisions
• Phase-space excluded-volume approach for light clusters in nuclear medium

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