Leading order relativistic hyperon-nucleon interactions in chiral effective field theory
… We have studied strangeness S = −1 hyperon-nucleon scattering at leading order in a
covariant framework of chiral effective field theory. Starting from the covariant chiral
Lagrangian, the small components of the baryon spinors are retained in deriving the
potentials in order to preserve Lorentz invariance. Strict SU(3) symmetry is imposed on the
contact terms, which yield 12 independent low energy constants. SU(3) symmetry is broken
in the one-pseudoscalar-meson-exchange potentials because of the mass difference of …
covariant framework of chiral effective field theory. Starting from the covariant chiral
Lagrangian, the small components of the baryon spinors are retained in deriving the
potentials in order to preserve Lorentz invariance. Strict SU(3) symmetry is imposed on the
contact terms, which yield 12 independent low energy constants. SU(3) symmetry is broken
in the one-pseudoscalar-meson-exchange potentials because of the mass difference of …
Abstract
We apply a recently proposed covariant power counting in nucleon-nucleon interactions to study strangeness S=− 1
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