175 citations · 858 across the 17 of their papers we have counts for
4 papers · 1 filter
Perturbation theory for O(3) topological charge correlators
Miguel Aguado, Erhard Seiler
To check the consistency of positivity requirements for the two-point correlation function of the topological charge density, which were identified in a previous paper, we are comp…
The clash of positivities in topological density correlators
Miguel Aguado, Erhard Seiler
We discuss the apparent conflict between reflection positivity and positivity of the topological susceptibility in two-dimensional nonlinear sigma models and in four-dimensional ga…
Technical notes on a 2-d lattice O(N) model problem
Miguel Aguado
This paper provides a technical companion to M. Aguado and E. Seiler, hep-lat/0406041, in which the fate of perturbation theory in the thermodynamic limit is discussed for the O(N)…
Some new results on an old controversy: is perturbation theory the correct asymptotic expansion in nonabelian models?
M. Aguado, E. Seiler
Several years ago it was found that perturbation theory for two-dimensional O(N) models depends on boundary conditions even after the infinite volume limit has been taken termwise,…