## Abstract

The application of renormalisation group recursion relations to the calculation of critical exponents in d dimensions to second order in epsilon =4-d is discussed. It is shown that in the limit of a large scale factor b, the fixed point value, u* of the four-spin coupling constant is correctly given to second order by a renormalisation group equation in which all irrelevant variables, mass renormalisation graphs, and mass terms in the propagators are ignored. Related approximations in the calculation of the critical exponents are justified. The unexpected equality to order epsilon ^{2} of u* and u_{0c}, the Feynman graph coupling constant, is discussed.

Original language | English |
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Article number | 005 |

Pages (from-to) | 3673-3685 |

Number of pages | 13 |

Journal | Journal of Physics C: Solid State Physics |

Volume | 7 |

Issue number | 20 |

DOIs | |

State | Published - 1 Dec 1974 |

Externally published | Yes |

## ASJC Scopus subject areas

- Condensed Matter Physics
- Engineering (all)
- Physics and Astronomy (all)