Yukawa's Pion, Low-Energy QCD and Nuclear Chiral Dynamics

Abstract

A survey is given of the evolution from Yukawa's early work, via the understanding of the pion as a Nambu-Goldstone boson of spontaneously broken chiral symmetry in QCD, to modern developments in the theory of the nucleus based on the chiral effective field theory representing QCD in its low-energy limit.

Comments: 21 pages, 13 figures. Proc. Yukawa-Tomonaga Symposium, Kyoto, Dec.06; to be publ. in Progr. Theor. Phys. Suppl. (Kyoto)