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Pré-Publication, Document De Travail Année : 2024

Light clusters in hot nuclear matter: calibrating the interaction with heavy-ion collisions

Résumé

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.

Dates et versions

hal-04644843 , version 1 (11-07-2024)

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Tiago Custódio, Alex Rebillard-Soulié, Rémi Bougault, Diégo Gruyer, Francesca Gulminelli, et al.. Light clusters in hot nuclear matter: calibrating the interaction with heavy-ion collisions. 2024. ⟨hal-04644843⟩
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