On the origin and movement of the poles in the coupled channels model for $\bar{K}N$ interactions

TL;DR

This paper investigates the origin and movement of poles in the chiral coupled-channel model for antikaon-nucleon interactions, analyzing their evolution from symmetry limits and zero coupling scenarios.

Contribution

It provides a detailed analysis of how poles in the $ar{K}N$ interaction model originate and evolve from symmetry and coupling limits, enhancing understanding of resonance structures.

Findings

Poles are linked to nonzero diagonal couplings in specific channels.

Pole evolution from zero coupling and SU(3) symmetry limits is characterized.

The study clarifies the nature of resonances in $ar{K}N$ interactions.

Abstract

The origin of the poles generated by chiral coupled-channel dynamics and applied to $\bar{K}N$ interactions is related to the nonzero diagonal couplings in the $\pi\Sigma$, $\bar{K}N$ and $K\Xi$ channels. An evolution of the poles from the zero coupling limit and from a limit of restored SU(3) symmetry is discussed.