Abstract
In this proceeding results for hyperon-nucleon interactions calculated at next-to-leading order (i.e. one-loop order) in SU(3) chiral effective field theory are presented. The potentials include contributions from one- and two-meson exchange, and four-baryon contact terms provided by the SU(3) chiral Lagrangian. SU(3) flavor symmetry is imposed for the low-energy constants, while explicit SU(3) symmetry breaking is included only through the physical pseudoscalar-meson and baryon masses. Calculations have been performed for hyperon-nucleon scattering cross sections using a regularized Lippmann-Schwinger equation. A good description of the available data is achieved, comparable to modern phenomenological hyperon-nucleon interaction models. These results provide a new basis for studies of hypernuclei or hyperons in nuclear matter.
Highlights
Upcoming experimental data for hyperon-nucleon scattering will lead to new and stronger constraints on the hyperon-nucleon interaction
In this proceeding results for hyperon-nucleon interactions calculated at nextto-leading order in SU(3) chiral effective field theory are presented
A good description of the available data is achieved, comparable to modern phenomenological hyperon-nucleon interaction models. These results provide a new basis for studies of hypernuclei or hyperons in nuclear matter
Summary
Upcoming experimental data for hyperon-nucleon scattering will lead to new and stronger constraints on the hyperon-nucleon interaction. At leading order [6, 7] one can get already a reasonable description of the available hyperonnucleon scattering data. We have recently extended this calculation to next-to-leading order in SU(3) chiral effective field theory [8], where one obtains an improved description of the experimental data, comparable to modern phenomenological models.
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