Concerning the Proofs of Spontaneous Chiral Symmetry Breaking in Q.C.D. from the Effective Lagrangian Point of View

摘要

Claims that spontaneous chiral symmetry breaking in Q.C.D. is mediated by the U(1) axial anomaly are examined from the viewpoint of effective chiral lagrangians. The proofs are seen to arise from a use of effective chiral lagrangians in which the U(1) axial symmetry is explicitly broken by effects of the anomaly. A U(1) axial invariant chiral lagrangian (to be presented) offers no such proof. (Atomindex citation 14:797027)