Bootstrapping Mixed MN Correlators in 3D

Abstract

The recent emergence of the modern conformal bootstrap method for the study of conformal field theories (CFTs) has enabled the revisiting of old problems in classical critical phenomena described by three-dimensional CFTs. The study of such CFTs with $O(m{)}^n⋊S_n$ global symmetry, also known as MN models, is pursued in this work. Systems of mixed correlators involving scalar operators in two different representations of the global symmetry group are considered. Isolated allowed regions are found in parameter space for various values of $m$ and $n$. These "islands" can be separated into two qualitative groups: those close to the unitarity bound and those further away. As a by-product of our analysis generic tensor structures required to bootstrap any $G^n⋊S_n$ theory with $G$ arbitrary are worked out.

arXiv comment29 pages, 14 figures. v2: 30 pages, 15 figures. Comments added. Some rearranging of sections for clarity of presentation. New Fig. 7 and additional information added to Fig. 9 v3: some additional clarifications

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