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Light clusters in hot nuclear matter: calibrating the interaction with heavy-ion
Authors: Custódio, T.; Rebillard-Soulié, A.; Bougault, R.; Gruyer, D.; Gulminelli, F.; Malik, T.; Pais, H.; Providência, C.
Ref.: Submitted on 2 Jul (2024)
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.
