The Quest for Pionic and Kaonic Nuclear Bound Systems Following Yukawa and Tomonaga

Details The Quest for Pionic and Kaonic Nuclear Bound Systems Following Yukawa and Tomonaga The Quest for Pionic and Kaonic Nuclear Bound Systems Following Yukawa and Tomonaga

2007-09-09

arxiv.org/abs/0709.1408v1

Prog.Theor.Phys.Suppl.170:138-160,2007

Physics

Nuclear Physics

Nuclear Experiment

20 pages, 11 figures. Prog. Theor. Phys., in press

Scientific paper

10.1143/PTPS.170.138

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.

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