The QCD analytic running coupling and chiral symmetry breaking

Abstract

We study the dependence on the pion mass of the QCD effective charge by employing the dispersion relations for the Adler D function. This new massive analytic running coupling is compared to the effective coupling saturated by the dynamically generated gluon mass. A qualitative picture of the possible impact of the former coupling on the chiral symmetry breaking is presented.

Comments: Talk given at 11th International QCD Conference (QCD 04), 5 - 10 July 2004, Montpellier, France; 4 pages, 4 figures