Field Strength Correlator and an Infrared Fixed Point of the Wilsonian Exact Renormalization Group Equations

Details Field Strength Correlator and an Infrared Fixed Point of the Wilsonian Exact Renormalization Group Equations Field Strength Correlator and an Infrared Fixed Point of the Wilsonian Exact Renormalization Group Equations

1998-07-15

arxiv.org/abs/hep-ph/9807380v1

Eur.Phys.J.C7:673-683,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, LaTex, 4 figures

Scientific paper

10.1007/s100529801033

The correlator of two field strengths is computed from an effective action for Yang Mills theories, which contains both gluons and an auxiliary antisymmetric tensor field for the field strength as local variables. This action allows to relate explicitly many different approaches to confinement, and is computed using Wilsonian renormalization group equations with the bare Yang Mills action as starting point. Due to the inclusion of a higher dimensional operator in the ghost sector the running gauge coupling becomes vanishingly small at a critical scale k_c, and the resulting low energy action resembles the action of a confining string theory proposed by Polyakov.

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