Publication details for Patrick DoreyDorey, Patrick, Siviour, Guy & Takács, Gábor (2015). Form factor relocalisation and interpolating renormalisation group flows from the staircase model. Journal of High Energy Physics 2015(3): 054.
- Publication type: Journal Article
- ISSN/ISBN: 1029-8479 (electronic)
- DOI: 10.1007/JHEP03(2015)054
- Keywords: Exact S-Matrix, Integrable Field Theories
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
We investigate the staircase model, introduced by Aliosha Zamolodchikov through an analytic continuation of the sinh-Gordon S-matrix to describe interpolating flows between minimal models of conformal field theory in two dimensions. Applying the form factor expansion and the c-theorem, we show that the resulting c-function has the same physical content as that found by Zamolodchikov from the thermodynamic Bethe Ansatz. This turns out to be a consequence of a nontrivial underlying mechanism, which leads to an interesting localisation pattern for the spectral integrals giving the multi-particle contributions. We demonstrate several aspects of this form factor relocalisation, which suggests a novel approach to the construction of form factors and spectral sums in integrable renormalisation group flows with non-diagonal scattering.