Multiloop calculations with parametric integration in critical dynamics: the four-loop analytic study of model A of ${\varphi }^4$ theory

Loran Ts. Adzhemyan, Diana A. Davletbaeva, Daniil A. Evdokimov +1

We perform an analytical four loop calculation of exponent $z$ in model A of critical dynamics in $d=4-2\epsilon$ dimensions. This is the first time such a large order of pertur…