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Reflection factors and exact g-functions for purely elastic scattering theories

Patrick Dorey, Anna Lishman, Chaiho Rim, Roberto Tateo

hep-tharXiv:hep-th/0512337

Abstract

We discuss reflection factors for purely elastic scattering theories and relate them to perturbations of specific conformal boundary conditions, using recent results on exact off-critical g-functions. For the non-unitary cases, we support our conjectures using a relationship with quantum group reductions of the sine-Gordon model. Our results imply the existence of a variety of new flows between conformal boundary conditions, some of them driven by boundary-changing operators.

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