S-wave meson-baryon potentials with strangeness from Lattice QCD

TL;DR

This study uses lattice QCD simulations to analyze s-wave meson-baryon interactions with strangeness, revealing short-range repulsions and comparing phase shifts with experimental data.

Contribution

First lattice QCD calculation of s-wave meson-baryon potentials with strangeness at heavy quark masses, highlighting repulsive interactions and phase shift analysis.

Findings

Potentials show short-range repulsion due to Pauli blocking.

I=1 KN phase shifts are computed and compared with experiments.

Results suggest the importance of quark mass effects on interactions.

Abstract

We study the s-wave I=2 \pi \Sigma and I=1 KN interactions from 2+1 flavor full lattice QCD simulation for relatively heavy quark mass corresponding to m_{\pi}=700 MeV. The s-wave meson-baryon potentials are obtained from the Nambu-Bethe-Salpeter amplitudes. Potentials in both channels reveal short range repulsions, which suggest the importance of the Pauli blocking effect. The I=1 KN scattering phase shifts are calculated and compared with the existing experimental data.