Roaming form factors for the tricritical to critical Ising flow

D. X. Horváth, P. E. Dorey, G. Takács

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3 Citations (Scopus)


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.

Original languageEnglish
Article number51
JournalJournal of High Energy Physics
Issue number7
Publication statusPublished - Jul 1 2016



  • Field Theories in Lower Dimensions
  • Integrable Field Theories

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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