English

Leading CFT constraints on multi-critical models in d>2

High Energy Physics - Theory 2017-07-04 v2 Statistical Mechanics

Abstract

We consider the family of renormalizable scalar QFTs with self-interacting potentials of highest monomial ϕm\phi^{m} below their upper critical dimensions dc=2mm2d_c=\frac{2m}{m-2}, and study them using a combination of CFT constraints, Schwinger-Dyson equation and the free theory behavior at the upper critical dimension. For even integers m4m \ge 4 these theories coincide with the Landau-Ginzburg description of multi-critical phenomena and interpolate with the unitary minimal models in d=2d=2, while for odd mm the theories are non-unitary and start at m=3m=3 with the Lee-Yang universality class. For all the even potentials and for the Lee-Yang universality class, we show how the assumption of conformal invariance is enough to compute the scaling dimensions of the local operators ϕk\phi^k and of some families of structure constants in either the coupling's or the ϵ\epsilon-expansion. For all other odd potentials we express some scaling dimensions and structure constants in the coupling's expansion.

Keywords

Cite

@article{arxiv.1703.04830,
  title  = {Leading CFT constraints on multi-critical models in d>2},
  author = {Alessandro Codello and Mahmoud Safari and Gian Paolo Vacca and Omar Zanusso},
  journal= {arXiv preprint arXiv:1703.04830},
  year   = {2017}
}

Comments

29 pages, 1 figure; V2: references added, minor improvements, to appear in JHEP

R2 v1 2026-06-22T18:45:28.622Z