On the infrared behavior of Landau gauge Yang-Mills theory

Details On the infrared behavior of Landau gauge Yang-Mills theory On the infrared behavior of Landau gauge Yang-Mills theory

2008-10-13

arxiv.org/abs/0810.1987v2

Annals Phys.324:2408-2437,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 11 figures, v2:clarifications added and typos corrected; version accepted by Annals of Physics

Scientific paper

10.1016/j.aop.2009.07.009

We discuss the properties of ghost and gluon propagators in the deep infrared momentum region of Landau gauge Yang-Mills theory. Within the framework of Dyson-Schwinger equations and the functional renormalization group we demonstrate that it is only a matter of infrared boundary conditions whether infrared scaling or decoupling occurs. We argue that the second possibility is at odds with global BRST symmetry in the confining phase. For this purpose we improve upon existing truncation schemes in particular with respect to transversality and renormalization.

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