2 papers
hep-lat2005
Cutoff effects in the O(N) sigma model at large N
Ulli Wolff, Francesco Knechtli, Bjoern Leder +1
The computation of the step scaling function for the finite size mass-gap in the O(N) sigma model at large N is reviewed. Practically exact nonperturbative results become available…
hep-lat2005
Cutoff Effects in O(N) Nonlinear Sigma Models
Francesco Knechtli, Bjoern Leder, Ulli Wolff
In the nonlinear O(N) sigma model at N=3 unexpected cutoff effects have been found before with standard discretizations and lattice spacings. Here the situation is analyzed further…