Form factors in the massless coset models su(2)k+1 su(2)k /su(2)2k+1 - Part I
Abstract
Massless flows between the coset model su(2)k+1 su(2)k /su(2)2k+1 and the minimal model Mk+2 are studied from the viewpoint of form factors. These flows include in particular the flow between the Tricritical Ising model and the Ising model. Form factors of the trace operator with an arbitrary number of particles are constructed, and numerical checks on the central charge are performed with four particles contribution. Large discrepancies with respect to the exact results are observed in most cases.
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