Lattice gluodynamics computation of Landau-gauge Green's functions in the deep infrared

I.L. Bogolubsky , E.-M. Ilgenfritz , M. M\"uller-Preussker , A. Sternbeck

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classification ✦ hep-lat hep-ph

keywords deepgluodynamicsinfraredlandau-gaugelatticeresultsallowsannealing

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We present recent results for the Landau-gauge gluon and ghost propagators in SU(3) lattice gluodynamics obtained on a sequence of lattices with linear extension ranging from L=64 to L=96 at $\beta = 5.70$, thus reaching "deep infrared" momenta down to 75 MeV. Our gauge-fixing procedure essentially uses a simulated annealing technique which allows us to reach gauge-functional values closer to the global maxima than standard approaches do. Our results are consistent with the so-called decoupling solutions found for Dyson-Schwinger and functional renormalization group equations.

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