Speaker
Dr
Ales Cieply
(Nuclear Physics Institute, Rez near Prague)
Description
We analyze the $\bar{K}N$ and $\eta N$ interactions using an effective separable potential coupled channels model that implements chiral symmetry [1], [2]. The energy dependence of both the $\bar{K}N$ and $\eta N$ scattering amplitudes is strongly affected by dynamically generated resonances close to the meson-baryon thresholds, the $\Lambda(1405)$ and $N^{\star}(1535)$, respectively. We discuss the relation of the observed energy dependence to the resonance pole dynamics in a free space and in nuclear medium. The model predicts an $\eta N$ stattering length $\Re a_{\eta N} \approx 0.7$ fm and in-medium subthreshold attraction most likely sufficient to generate $\eta$-nuclear bound states [3], similar to those predicted for the $\bar{K}$-nuclear
interactions [4].
[1] A.~Cieply, J.~Smejkal - Nucl.~Phys.~A 881 (2012) 115
[2] A.~Cieply, J.~Smejkal - Nucl.~Phys.~A 919 (2013) 46
[3] A.~Cieply, E.~Friedman, A.~Gal, J.~Mares - Nucl.~Phys.~A 925 (2014) 126
[4] A.~Cieply, E.~Friedman, A.~Gal, D.~Gazda, J.~Mare\v{s} - Phys.~Rev.~C 84 (2011) 045206
Primary author
Dr
Ales Cieply
(Nuclear Physics Institute, Rez near Prague)
Co-author
Dr
Jaroslav Smejkal
(Czech Technical University, Prague)
