1999/02/22 by Hisao Nakkagawa, Hiroshi Yokota, Nakkagawa, Hisao +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9902422
6 pages, Latex file with sprocl.sty and epsf.sty, including 1 figure (eps.file). Talk presented at 1998 YITP-Workshop on QCD and Hadron Physics. To be published in Proceedings
arxiv created 1999/02/22 · arxiv updated 2009/11/30
In this paper the phase structure of the massive λϕ4 model at finite temperature (T ≠ 0) is investigated by applying a resummation method inspired by the renormalization-group (RG) improvement to the one-loop effective potential. The resummation method a la RG-improvement is shown to work quite succesfully by resumming up systematically large correction-terms of O(λT/μ) and of O(λ(T/μ)2). The temperature-dependent phase transition of the model is shown to proceed through the second order transition. The critical exponents are determined analytically and are compared with those in other analyses.