Per Elmfors
Published 1992-09-25Version 1
The temperature renormalization group equation (TRGE) is compared with a diagrammatic expansion for the $(\phi^4)_4$-theory. It is found that the one-loop TRGE resums the leading powers of temperature for the effective mass. A two-loop contribution to TRGE is required to do the leading resummation for the coupling constant. It is also shown that the higher order TRGE resums subleading powers of temperature.
Comments: 17pp, LATEX and FEYNMAN, NORDITA 92/63P
Journal: Int. J. Mod. Phys. A8 (1993) 1887
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