Light clusters in warm stellar matter: calibrating the cluster couplings
Abstract
The abundances of light clusters within a formalism that considers in-medium effects are calculated using several relativistic mean-field models, with both density-dependent and density-independent couplings. Clusters are introduced as new quasiparticles, with a modified coupling to the scalar meson field. A comparison with experimental data from heavy ion collisions allows settling the model dependence of the results and the determination of the couplings of the light clusters to the meson fields. We find that extra experimental constraints at higher density are needed to convincingly pin down the density associated to the melting of clusters in the dense nuclear medium. The role of neutron rich clusters, such as He, in asymmetric matter is discussed.
Cite
@article{arxiv.2009.14035,
title = {Light clusters in warm stellar matter: calibrating the cluster couplings},
author = {Tiago Custódio and Alexandre Falcão and Helena Pais and Constança Providência and Francesca Gulminelli and Gerd Röpke},
journal= {arXiv preprint arXiv:2009.14035},
year = {2020}
}
Comments
10 pages, 8 figures, and 1 table; accepted for publication in the EPJA Topical Issue "Light Clusters in Nuclei and Nuclear Matter: Nuclear Structure and Decay, Heavy Ion Collisions, and Astrophysics"