Light clusters in dilute heavy-baryon admixed nuclear matter

Abstract

We study the composition of nuclear matter at sub-saturation densities, non-zero temperatures, and isospin asymmetry, under the conditions characteristic of binary neutron star mergers, stellar collapse, and low-energy heavy-ion collisions. The composition includes light clusters with mass number $A\le 4$, a heavy nucleus ($\isotope[56]{Fe}$), the $\Delta$-resonances, the isotriplet of pions, as well as the $\Lambda$ hyperon. The nucleonic mean-fields are computed from a zero-range density functional, whereas the pion-nucleon interactions are treated to leading order in chiral perturbation theory. We show that with increasing temperature and/or density the composition of matter shifts from light-cluster to heavy baryon dominated one, the transition taking place nearly independent of the magnitude of the isospin. Our findings highlight the importance of simultaneous treatment of light clusters and heavy baryons in the astrophysical and heavy-ion physics contexts.

v3: matches published version; v2: version in print, some clarifications, corrections, and additional references, 8 page, 4 figures. v1: 6 pages, 4 figures

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Cited by in corpus (11)

• The ALICE experiment: a journey through QCD
• Heavy Baryons in Compact Stars
• Delta-resonances and hyperons in proto-neutron stars and merger remnants
• Equation of state and composition of proto-neutron stars and merger remnants with hyperons
• Universal relations for compact stars with heavy baryons
• Light clusters in warm stellar matter: calibrating the cluster couplings
• Phase diagram of alpha matter with Skyrme-like scalar interaction
• Employing ternary fission of ${}^{242}$Pu as a probe of very neutron rich matter
• Electrical conductivity of warm neutron star crust in magnetic fields: Neutron-drip regime
• Heavy baryons in hot stellar matter with light nuclei and hypernuclei
• Light hyperclusters and hyperons in low-density hot stellar matter