Strong-coupling analysis of large-N two-dimensional lattice chiral models.

Abstract

N=\ensuremath{\infty} two-dimensional chiral models on the square and honeycomb lattices are investigated by a strong-coupling analysis. The strong-coupling expansion turns out to be predictive for the evaluation of continuum physical quantities, to the point of showing asymptotic scaling. Indeed in the strong-coupling region a quite large range of \ensuremath{\beta} values exists where the fundamental mass agrees, within about 5% on the square lattice and about 10% on the honeycomb lattice, with the continuum predictions in the energy scheme.