Critical exponents for the percolation problem and the yang-lee edge singularity

Abstract

Gives details of a calculation of critical exponents for a class of field theory models that have an interaction cubic in the fields. The results have already been reported, give the exponents to third order in epsilon where epsilon =6-d and d is the dimensionality of space. The class of models includes the percolation problem and the Yang-Lee edge singularity, so the authors give explicit results for the exponents to order epsilon 3 in these cases. By resummation methods, based on the symptotic behaviour of the epsilon expansion, they obtain numerical estimates for these exponents for a number of interesting values of d.