## Abstract

We consider a certain modification of the free-field representation of the form factors in the Bullough-Dodd model. The two-particle minimal form factors are eliminated from the construction. We consequently obtain a convenient representation for the multiparticle form factors, establish recurrence relations between them, and study their properties. We use the proposed construction to obtain the free-field representation of form factors for the lightest particles in the Φ_{1,2}-perturbed minimal models. As an important example, we consider the Ising model in a magnetic field. We verify that the results obtained in the framework of the proposed free-field representation agree with the corresponding results obtained by solving the bootstrap equations.

Original language | English |
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Pages (from-to) | 1518-1540 |

Number of pages | 23 |

Journal | Theoretical and Mathematical Physics |

Volume | 173 |

Issue number | 2 |

DOIs | |

Publication status | Published - 1 Nov 2012 |

## Scopus subject areas

- Statistical and Nonlinear Physics
- Mathematical Physics