Mass Generation in Perturbed Massless Integrable Models

Details Mass Generation in Perturbed Massless Integrable Models Mass Generation in Perturbed Massless Integrable Models

2005-03-02

arxiv.org/abs/hep-th/0503018v1

Phys.Lett. B617 (2005) 133-139

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1016/j.physletb.2005.05.002

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.

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