Resonance energy of the barKNN-piYN system

TL;DR

This paper investigates the resonance energies of strange dibaryons using coupled-channels Faddeev equations, revealing significant modifications in pole positions when approximations are applied, highlighting the importance of full three-body dynamics.

Contribution

It introduces a detailed three-body calculation for strange dibaryons and compares it to simplified two-body approximations, emphasizing the impact of coupled-channels dynamics.

Findings

Significant shifts in resonance pole positions with full three-body calculations.

Approximate two-body methods may underestimate or misrepresent resonance energies.

Full coupled-channels approach provides more accurate resonance predictions.

Abstract

The resonance energies of strange dibaryons are investigated with the use of the \bar{K}NN-\pi Y N coupled-channels Faddeev equation. It is found that the pole positions of the predicted three-body amplitudes are significantly modified when the three-body coupled-channels dynamics is approximated, as is done in the literature, by the effective two-body \bar{K}N interactions.