Mandar Bhagwat

Kent State University

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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