Universal critical coupling constants for the three-dimensional<i>n</i>-vector model from field theory
Universal critical coupling constants for the three-dimensional<i>n</i>-vector model from field theory
The field-theoretical renormalization group (RG) approach in three dimensions is used to estimate the universal critical values of renormalized coupling constants ${g}_{6}$ and ${g}_{8}$ for the $O(n)$-symmetric model. The RG series for ${g}_{6}$ and ${g}_{8}$ are calculated in the four- and three-loop approximations, respectively, and then resummed by means of …