The Quest for Pionic and Kaonic Nuclear Bound Systems Following Yukawa and Tomonaga
arXiv:0709.1408 · doi:10.1143/PTPS.170.138
Abstract
After sketching some historical events related to Yukawa and Tomonaga concerning the birth of mesons, the author describes recent developments in the spectroscopy of pion-nucleus bound states via "pion-transfer" reactions. The role of pions as Nambu-Goldstone bosons in nuclear media is emphasized by recently obtained experimental evidence for the partial restoration of chiral symmetry breaking. New light is shed on Kbar mesons, which play a unique role in forming dense nuclear systems. The basic unit, K- pp, is predicted to possess a molecular structure with quasi-Lambda(1405) as an "atomic constituent". We find here "super strong nuclear force" produced by a migrating real Kbar meson in the Heitler-London-Heisenberg scheme in place of the normal nuclear force mediated by Yukawa's virtual mesons.
20 pages, 11 figures. Prog. Theor. Phys., in press