Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-07-10
Physics
High Energy Physics
High Energy Physics - Theory
published version, two appendices added
Scientific paper
Nonlinear integral equations are proposed for the description of the full
finite size spectrum of the 2-dimensional O(3) nonlinear sigma-model in a
periodic box. Numerical results for the energy eigenvalues are compared to the
rotator spectrum and perturbation theory for small volumes and with the
recently proposed generalized Luscher formulas at large volumes.
Balog Janos
Hegedus Arpad
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