Orateur
Prof.
Slawomir Wycech
(Soltan Institute for Nuclear Studies)
Description
Deeply bound KNN, KNNN and KNNNN states are discussed. The effective force exerted by the
K meson on the nucleons is calculated with static nucleons. Next the binding energies are obtained
by solving the Schrödinger equation or by variational calculations. The dominant attraction comes from the S-wave \Lambda(1405) and an additional contribution is due to \Sigma(1385). The latter state is formed at the nuclear peripheries and absorbs a sizable piece of the binding energy. It also generates new branches of quasi-bound states. The lowest binding energies
based on a phenomenological KN input fall into the 40-80 MeV range for KNN, 90-150 MeV for
KNNN and 120-220 MeV for K\alpha systems. The uncertainties are due to unknown KN interactions
in the distant subthreshold energy region.
Auteur principal
Prof.
Slawomir Wycech
(Andrzej Soltan Institute for Nuclear Studies, Warsaw, Poland)
Co-auteur
Prof.
Anthony M. Green
(Helsinki Institute of Physics, Finland)
