Fine-tuning of the quasi-bound $K^{-}pp$ state

Abstract

Characteristics of the quasi-bound state in the $K^{-}pp$ system strongly depend on the model of antikaon-nucleon interaction and weakly - on the nucleon-nucleon potential. In the present paper, dynamically exact Faddeev-type calculations with coupled $\bar{K}NN$ and $\pi \Sigma N$ were performed using different models of the $\Sigma N$ and $\pi N$ interactions to study the influence of these "less important" interaction on the three-body result. In addition, dynamically exact three-body Faddeev-type AGS calculations with three coupled particle channels $\bar{K}NN-\pi \Sigma N-\pi \Lambda N$ were performed.

Comments: 10 pages, 4 tables, submitted to the special issue of the Few-Body Physics journal "Advances on the Few-Body Problem in Physics - Selected and refereed papers from the 25th European Conference"