Thursday, February 16, 2012

1202.3432 (Julien Serreau et al.)

Lifting the Gribov ambiguity in Yang-Mills theories    [PDF]

Julien Serreau, Matthieu Tissier
We propose a new one-parameter family of Landau gauges for Yang-Mills
theories which can be formulated by means of functional integral methods and
are thus well suited for analytic calculations, but which are free of Gribov
ambiguities and avoid the Neuberger zero problem of the standard Fadeev-Popov
construction. The resulting gauge-fixed theory is perturbatively renormalizable
in four dimensions and, for what concerns the calculation of ghost and gauge
field correlators, it reduces to a massive extension of the Fadeev-Popov
action. We study the renormalization group flow of this theory at one-loop and
show that it has no Landau pole in the infrared for some - including physically
relevant - range of values of the renormalized parameters.
View original: http://arxiv.org/abs/1202.3432

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