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arXiv · hep-lat/0110202

Nonstandard Cutoff Effects in the Nonlinear Sigma Model

Martin Hasenbusch·Peter Hasenfratz·Ferenc Niedermayer·Bernhard Seefeld·Ulli Wolff
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Abstract

High precision measurements of the renormalized zero-momentum 4-point coupling g_R and of the Luscher-Weisz-Wolff running coupling gbar(L) = L*m(L) performed with two different lattice actions in the non-perturbative region confirm the earlier observations, that the cutoff effects look linear, in contrast to perturbative considerations. The use of different actions allows one to make a more reliable estimate on the continuum limit. The measurements were done for infinite volume correlation length up to 350.

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Martin Hasenbusch, Peter Hasenfratz, Ferenc Niedermayer, Bernhard Seefeld, Ulli Wolff. 2001-10-25. Nonstandard Cutoff Effects in the Nonlinear Sigma Model. https://doi.org/10.1016/s0920-5632(01)01883-7

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