We study the topological susceptibility, chi, of the 2D O(3) sigma-model by defining a density of topological charge as a local polynomial of the spin variables on the lattice. Following the field theoretical prescriptions we perform the additive and multiplicative renormalizations needed to extract-chi from Monte Carlo data. By numerical simulations we show that the field theoretical definition and the cooling method give a consistent determination of chi.
THE TOPOLOGICAL SUSCEPTIBILITY OF THE 2D O(3)SIGMA MODEL
DI GIACOMO, ADRIANO;VICARI, ETTORE
1992-01-01
Abstract
We study the topological susceptibility, chi, of the 2D O(3) sigma-model by defining a density of topological charge as a local polynomial of the spin variables on the lattice. Following the field theoretical prescriptions we perform the additive and multiplicative renormalizations needed to extract-chi from Monte Carlo data. By numerical simulations we show that the field theoretical definition and the cooling method give a consistent determination of chi.File in questo prodotto:
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