High-density K̄ nuclear systems with isovector deformation

Abstract

Using a phenomenological K̄N potential which reproduces $\Lambda$(1405) as an I=0 bound state of K̄N, we investigated deeply bound kaonic nuclei, ppnK${}^{-}$ and ${}^8$BeK${}^{-}$, with the method of Antisymmetrized Molecular Dynamics. Our calculations show that strongly bound kaonic nuclear systems with unusual exotic structures are formed around the K${}^{-}$, which attracts the surrounding nucleons to an extremely high-density assembly and induces a proton-neutron separation, ``isovector deformation''.

Comments: 4 pages, 11 figures, submitted to Phys. Rev. Lett