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.
Caselle M., Gliozzi F., Megna R., Ravanini F., Sciuto S. (1983). Improved lattice actions for SU(N) × SU(N) chiral models. PHYSICS LETTERS. SECTION B, 130(1-2), 81-86 [10.1016/0370-2693(83)91068-7].
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.File in questo prodotto:
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