2005/03/02 by Davide Controzzi, D. Controzzi, Giuseppe Mussardo +1
Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Black Holes and Theoretical Physics #Fermion #Integrable system #Mass generation #Massless particle #Mathematical physics #Mathematics #Nonlinear Waves and Solitons #Order (exchange) #Particle physics #Perturbation (astronomy) #Perturbation theory (quantum mechanics) #Physics #Quantum mechanics #Theoretical physics #cond-mat.str-el #hep-th
paper · pdf · doi:10.1016/j.physletb.2005.05.002
published as Phys.Lett. B617 (2005) 133-139
arxiv created 2005/03/02 · openalex publication_date 2005/05/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We extend form-factor perturbation theory to non--integrable deformations of massless integrable models, in order to address the problem of mass generation in such systems. With respect to the standard renormalisation group analysis this approach is more suitable for studying the particle content of the perturbed theory. Analogously to the massive case, interesting information can be obtained already at first order, such as the identification of the operators which create a mass gap and those which induce the confinement of the massless particles in the perturbed theory.