Eur. Phys. J. A (2020) 56: 55
https://doi.org/10.1140/epja/s10050-020-00055-6

Regular Article –Theoretical Physics

Structure of single- hypernuclei with chiral hyperon–nucleon potentials

¹ Institute for Advanced Simulation, Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425, Jülich, Germany
² Istituto Nazionale di Fisica Nucleare, Sezione di Catania. Dipartimento di Fisica “Ettore Majorana”, Università di Catania, Via Santa Sofia 64, 95123, Catania, Italy

^* e-mail: isaac.vidana@ct.infn.it

Received: 17 October 2019
Accepted: 20 December 2019
Published online: 12 February 2020

Abstract

The structure of single- hypernuclei is studied using the chiral hyperon-nucleon potentials derived at leading order (LO) and next-to-leading order (NLO) by the Jülich–Bonn–Munich group. Results for the separation energies of single-particle states for various hypernuclei from to are presented for the LO interaction and the 2013 (NLO13) and 2019 (NLO19) versions of the NLO potentials. It is found that the results based on the LO potential show a clear tendency for overbinding while those for the NLO13 interaction underbind most of the considered hypernuclei. A qualitatively good agreement with the data is obtained for the NLO19 interaction over a fairly large range of mass number values when considering the uncertainty due to the regulator dependence. A small spin-orbit splitting of the p-, d-, f-, and g-wave states is predicted by all interactions, in line with the rather small values observed in pertinent experiments.