Chiral Symmetry and Axial Anomaly in Hadron and Nuclear Physics --- a review --

Abstract

The important role played by chiral symmetry and axial anomaly in QCD in nuclear physics is reviewed. Some recent topics on possible chiral restoration in hot and/or dense matter are picked up. We also discuss so called {\em effective} restoration of chiral anomaly hot and/or dense matter, as may be seen in a character change of ${\eta }^{\prime }$ meson.

Comments: 6 pages, no figure. Invited talk at The 7th Japan-China Joint Nuclear Physics Symposium, November 9(Mon) to November 13(Fri), 2009, University of Tsukuba, Japan. Published in the conference proceedings (AIP series)