https://doi.org/10.1140/epja/s10050-020-00100-4
Regular Article - Theoretical Physics
Hyperon–nucleon interaction within chiral effective field theory revisited
1
Helmholtz Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, 53115, Bonn, Germany
2
Institute for Advanced Simulation, Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425, Jülich, Germany
3
Tbilisi State University, 0186, Tbilisi, Georgia
* e-mail: j.haidenbauer@fz-juelich.de
Received:
28
June
2019
Accepted:
30
September
2019
Published online:
19
March
2020
The 
and 
interactions are considered at next-to-leading order in SU(3) chiral effective field theory. Different options for the low-energy constants that determine the strength of the contact interactions are explored. Two variants are analysed in detail which yield equivalent results for and scattering observables but differ in the strength of the 
transition potential. The influence of this difference on predictions for light hypernuclei and on the properties of the 
and 
hyperons in nuclear matter is investigated and discussed. The effect of the variation in the potential strength of the - coupling (also called 
conversion) is found to be moderate for the considered 
and 
hypernuclei but sizable in case of the matter properties. Further, the size of three-body forces and their relation to different approaches to hypernuclear interactions is discussed.
© The Author(s), 2020
