Asymptotic Scaling and Monte Carlo Data

Details Asymptotic Scaling and Monte Carlo Data Asymptotic Scaling and Monte Carlo Data

2005-11-02

arxiv.org/abs/hep-lat/0511006v1

PoS LAT2005 (2005) 036

Physics

High Energy Physics

High Energy Physics - Lattice

Poster presented by A. Trivini at Lattice 2005, Dublin. 6 pages. PoS style

Scientific paper

It is a generally known problem that the behaviour predicted from perturbation theory for asymptotically free theories like QCD, i.e. asymptotic scaling, has not been observed in Monte Carlo simulations when the series is expressed in terms of the bare coupling g_0. This discrepancy has been explained in the past with the poor convergence properties of the perturbative series in the g_0. An alternative point of view, called Lattice-Distorted Perturbation Theory proposes that lattice artifacts due to the finiteness of the lattice spacing, a, cause the disagreement between Monte Carlo data and perturbative scaling. Following this alternative scenario, we fit recent quenched data from different observables to fitting functions that include these cut-off effects, confirming that the lattice data are well reproduced by g_0-PT with the simple addition of terms O(a^n).

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