Infrared Behaviour of Massless Integrable Flows entering the Minimal Models from phi_31

Abstract

It is known that any minimal model M_p receives along its phi_31 irrelevant direction *two* massless integrable flows: one from M_{p+1} perturbed by phi_{13}, the other from Z_{p-1} parafermionic model perturbed by its generating parafermion field. By comparing Thermodynamic Bethe Ansatz data and ``predictions'' of infrared Conformal Perturbation Theory we show that these two flows are received by M_p with opposite coupling constants of the phi_31 irrelevant perturbation. Some comments on the massless S matrices of these two flows are added.

12 pages, Latex - One misprinted (uninfluent) coefficient corrected in Tab. 1

References in corpus (2)

• Massless Flows II: the exact S-matrix approach
• Rg Flows in the $D$-Series of Minimal Cfts

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