Investigation into O(N) Invariant Scalar Model Using Auxiliary-Mass Method at Finite Temperature

Abstract

Using auxiliary-mass method, O(N) invariant scalar model is investigated at finite temperature. This mass and an evolution equation allow us to calculate an effective potential without an infrared divergence. Second order phase transition is indicated by the effective potential. The critical exponents are determined numerically.

Comments: LaTex 8 pages with 3 eps figures