Search for Deeply Bound Kaonic Nuclear States in the AMADEUS Experiment

Hyperon resonances coupled to pseudoscalar- and vector-baryon channels

“…Finally, the coupling at the pseudoscalar-baryon-vector-baryon vertex, g P BV B in Eq. (11), is treated as a parameter to be fitted, whose value can be approximately estimated using Eq. ( 9).…”

“…Investigating low-energy meson-baryon interaction, with nonzero strange quantum number, is of great importance to several interrelated topics in nuclear and hadron physics, such as the determination of the nature of the low-lying hyperons [1][2][3][4][5][6][7][8][9][10], the existence of kaonic-nuclear bound states, which has motivated several experiments [11][12][13], studies of kaon producing reactions which are, in turn, useful to understand the interactions of kaons in a dense medium [14], etc. The key motivational idea behind several related works is that the strangeness −1 meson-baryon interaction is attractive in nature, and it is especially interesting in the s-wave since, as now widely accepted, it generates the isoscalar resonance Λ(1405).…”

Exotic Properties of N*(1895) and Its Impact on Photoproduction of Light Hyperons

“…The nature of interactions in meson-baryon systems with strangeness −1 leads to several interesting questions, like the existence of exotic nuclear matter, the kaonic-nuclei, the possibility of the presence of strange matter in neutron stars, etc (see Refs. [1][2][3] for recent discussions on the topic). The key to finding an answer to these questions is understanding the nature of hyperons, especially Λ(1405).…”