Nonstandard cutoff effects in the nonlinear sigma model
Oct, 2001
3 pages
Part of Lattice field theory. Proceedings, 19th International Symposium, Lattice 2001, Berlin, Germany, August 19-24, 2001, 911-913
Published in:
- Nucl.Phys.B Proc.Suppl. 106 (2002) 911-913
Contribution to:
e-Print:
- hep-lat/0110202 [hep-lat]
Report number:
- DESY-01-193
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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.Note:
- 3 pages, 2 figures, Lattice2001(spin)
- talk: Berlin 2001/08/19
- sigma model: nonlinear
- lattice field theory: action
- coupling: renormalization
- dimension: 2
- numerical calculations: Monte Carlo
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