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Soonchul, Choi
희귀 핵 연구단
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Effects of many-body interactions in hypernuclei with Korea-IBS-Daegu-SKKU functionals

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Title
Effects of many-body interactions in hypernuclei with Korea-IBS-Daegu-SKKU functionals
Author(s)
Soonchul Choi; Hiyama, Emiko; Hyun, Chang Ho; Cheoun, Myung-Ki
Publication Date
2022-08
Journal
European Physical Journal A, v.58, no.8
Publisher
Springer Verlag
Abstract
© 2022, The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.We investigate the properties of Λ hyperon in Λ -hypernuclei using an effective nuclear density functional theory which is based on the low-energy effective field theory. It expands the energy density in the power of Fermi momentum, and consequently has multiple density dependence for the effective many-body interactions. Starting from the effective density functional for nucleons, we determine the parameters for the two- and many-body Λ -N interactions added to the nucleon energy density functional by fitting to Λ -hypernuclear data. The experimental data consist of the energy levels of a Λ hyperon in the p-, and d-states as well as s-state of Λ -hypernuclei in the mass range from Λ16O to Λ208Pb. The results turn out to properly explain the data relevant to hypernuclei owing to the effective many-body interaction apart from a few data in light hypernuclei. This hyperon functional is applied to study the Λ hyperon binding energy of the neutron-rich Λ124-136Sn isotopes which are under consideration for the measurement at J-PARC. Our results are shown to be insensitive to the density dependence of symmetry energy. We also examine the nuclear matter including Λ hyperon. We note that the hyperon threshold density depends on the nuclear matter properties.
URI
https://pr.ibs.re.kr/handle/8788114/12351
DOI
10.1140/epja/s10050-022-00817-4
ISSN
1434-6001
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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