Journal
ANNALS OF PHYSICS
Volume 324, Issue 11, Pages 2408-2437Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aop.2009.07.009
Keywords
Confinement; Infrared properties of Yang-Mills theory; Dyson-Schwinger equations; Functional renormalisation group
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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. (C) 2009 Elsevier Inc. All rights reserved.
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