A multiparameter family of tree level improved actions for SU(N) × SU(N) 2-d chiral models is proposed and the ratios of the scales Λ are calculated. For N = 2 the mass gap is evaluated by a strong coupling expansion and used to select improved actions with larger scaling region. Moreover the non universal O(g2) corrections are shown to be not negligible even for improved actions. © 1983.

Improved lattice actions for SU(N) × SU(N) chiral models

Ravanini F.;
1983

Abstract

A multiparameter family of tree level improved actions for SU(N) × SU(N) 2-d chiral models is proposed and the ratios of the scales Λ are calculated. For N = 2 the mass gap is evaluated by a strong coupling expansion and used to select improved actions with larger scaling region. Moreover the non universal O(g2) corrections are shown to be not negligible even for improved actions. © 1983.
1983
Caselle M.; Gliozzi F.; Megna R.; Ravanini F.; Sciuto S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/899279
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