Four-Loop Vacuum Energy Beta Function in O(N) Symmetric Scalar Theory
Abstract
Description
The beta function of the vacuum energy density is computed at the four-loop level in massive O(N) symmetric phi^4 theory. Dimensional regularization is used in conjunction with the MSbar scheme and all calculations are in momentum space in the massive theory. The result is
beta_v = g N/4+g^3 N(N+2)/96+g^4 N(N+2)(N+8)[12 zeta(3)-25]/1296+o(g^5).
16 pages, latex, no figures. Enlarged and updated reference list, minor typographical changes
16 pages, latex, no figures. Enlarged and updated reference list, minor typographical changes