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arXiv · hep-ph/0504195

Infrared enhanced analytic coupling and chiral symmetry breaking in QCD

A. C. Aguilar·A. V. Nesterenko·J. Papavassiliou
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Abstract

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 $Λ$, 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 $f_π$, and estimate the scale parameter $Λ$, in the presence of four active quarks, to be about 880 MeV.

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A. C. Aguilar, A. V. Nesterenko, J. Papavassiliou. 2005-07-14. Infrared enhanced analytic coupling and chiral symmetry breaking in QCD. https://doi.org/10.1088/0954-3899%2F31%2F9%2F002

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