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Mandar Bhagwat

Kent State University
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Modeling QCD for Hadron Phenomenology

In seeking to improve QCD modeling of hadron physics, we have
determined the amount of infrared enhancement, above that exhibited by
the gluon two-point function, necessary to correlate quenched-lattice
QCD data for the dressed-quark propagator and the dressed gluon
propagator via the rainbow gap equation. The solution of this gap
equation is used as input for a model of the dressed quark-gluon
vertex at zero gluon momentum, formed from a non-perturbative
extension of the two Feynman diagrams that contribute at one loop in
perturbation theory. Comparison is made with recent quenched-lattice
QCD data. Possible implications for hadron physics are discussed.

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