Four loop stochastic perturbation theory in 3d SU(3)

Details Four loop stochastic perturbation theory in 3d SU(3) Four loop stochastic perturbation theory in 3d SU(3)

2003-09-16

arxiv.org/abs/hep-lat/0309111v1

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 2 figure, Lattice2003(nonzero)

Scientific paper

10.1016/S0920-5632(03)02651-3

Dimensional reduction is a key issue in finite temperature field theory. For example, when following the QCD Free Energy from low to high scales across the critical temperature, ultrasoft degrees of freedom can be captured by a 3d SU(3) pure gauge theory. For such a theory a complete perturbative matching requires four loop computations, which we undertook by means of Numerical Stochastic Perturbation Theory. We report on the computation of the pure gauge plaquette in 3d, and in particular on the extraction of the logarithmic divergence at order g^8, which had already been computed in the continuum.

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