TBA equations for excited states in the O(3) and O(4) nonlinear σ-model
Abstract
TBA integral equations are proposed for 1-particle states in the sausage- and SS-models and their σ-model limits. Combined with the ground state TBA equations the exact mass gap is computed in the O(3) and O(4) nonlinear σ-model and the results are compared to 3-loop perturbation theory and Monte Carlo data.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.