Speaker
Description
The current chirally motivated theoretical approaches to low energy $\bar{K}N$ interactions
were reviewed in [1] with a special attention paid to the origin of resonances generated
dynamically within the coupled channels models derived from an effective SU(3) chiral
Lagrangian. The $\Lambda(1405)$ represents a well known resonance of this kind, interpreted
as a molecular $\bar{K}N$ bound state submerged in the $\pi\Sigma$ continuum, and affecting
strongly the properties of the $\bar{K}N$ system at low and subthreshold energies.
The dynamics of the $\bar{K}N$ system in nuclear matter was studied in [2] where the effects
due to Pauli blocking and hadron self energies in nuclear matter were discussed.
The $K^{-}N$ scattering amplitudes generated by the chirally motivated approaches and modified
to account for Pauli blocking were then used in the construction of a $K^-$-nuclear optical
potential. This potential was supplemented by a phenomenological term representing the $K^-$
multinucleon interactions, fitted to kaonic atom data. The optical potentials constructed from
the Prague [2] and Kyoto-Munich [3] scattering amplitudes were then applied in calculations of
kaonic nuclei [4]. The $K^-$ multinucleon interactions were found to cause radical increase of
the $K^-$ widths which exceed considerably the $K^-$ binding energies. Finally, we will report
briefly on our recently developed microscopic coupled channels model of the $K^{-}NN$ absorption
using chiral amplitudes [5].
[1] A. Cieply, M. Mai, U.-G. Meissner, J. Smejkal - J. Nucl. Phys. A 954, 17 (2016).
[2] A. Cieply, J. Smejkal - Nucl. Phys. A 881, 115 (2012).
[3] Y. Ikeda, T. Hyodo, W. Weise, Nucl. Phys. A 881, 98 (2012).
[4] J. Hrtankova, J. Mares, Phys. Lett. B 770, 342 (2017); Phys. Rev. C 96, 015205 (2017).
[5] J. Hrtankova, A. Ramos, prepared for publication.
| Graduate Student | No |
|---|---|
| Early Consideration | No |
