  We study the impact on chiral symmetry breaking of a recently developed model
for the QCD analytic invariant charge. This charge contains no adjustable
parameters, other than the QCD mass scale $\Lambda$, and embodies asymptotic
freedom and infrared enhancement into a single expression. Its incorporation
into the standard form of the quark gap equation gives rise to solutions for
the dynamically generated mass that display a singular confining behaviour at
the origin. Using the Pagels-Stokar method we relate the obtained solutions to
the pion decay constant $f_{\pi}$, and estimate the scale parameter $\Lambda$,
in the presence of four active quarks, to be about 880 MeV.

High Energy Physics - Phenomenology;High Energy Physics - Theory