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Durham University

Centre for Particle Theory

Research Staff

Publication details for Patrick Dorey

Horváth, D., Dorey, P. & Takács, G. (2016). Roaming form factors for the tricritical to critical Ising flow. Journal of High Energy Physics 2016(7): 051.

Author(s) from Durham


We study the massless flows described by the staircase model introduced by Al.B. Zamolodchikov through the analytic continuation of the sinh-Gordon S-matrix, focusing on the renormalisation group flow from the tricritical to the critical Ising model. We show that the properly defined roaming limits of certain sinh-Gordon form factors are identical to the form factors of the order and disorder operators for the massless flow. As a by-product, we also construct form factors for a semi-local field in the sinh-Gordon model, which can be associated with the twist field in the ultraviolet limiting free massless bosonic theory.