The Gluon Propagator with Two-loop Schwinger-Dyson Equations
arXiv:1403.4350 · doi:10.1103/PhysRevD.90.045037
Abstract
Gluon, ghost, and quark propagators are computed in the Schwinger-Dyson formalism. The full set of one-loop and two-loop contributions to the gap equations are evaluated for the first time. A new and efficient method for dealing with quadratic divergences is presented and a consistent renormalization method is proposed. We find that the two-loop contribution to the propagators is subleading, good fits to lattice data are possible, and reliable vertex models are important to obtaining desired ultraviolet, infrared, and gauge-symmetric behavior.
13 pages, 6 figures. v2: new figures, added references and discussion
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