HYPERNUCLEAR MATTER IN COMPACT STARS

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Submitted: 2025-02-10; Published: 2025-02-10

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Abstract

We discuss the recently developed energy density functional for hypernuclear matter, which is based on simultaneous calculation of heavy single-Λ hypernuclei and compact stars containing hypernuclear core. The nucleonic matter is described in terms of a density-dependent parametrization of nucleon-meson couplings, whereas the hyperonmeson couplings are deduced from the octet model. We identify the parameter space of hyperon-meson couplings for which massive stellar configurations with M≤2.1M⊙ exist and at the same time the laboratory Λ-hypernuclear data can be described.