Thermal effective potential of the O(N) linear sigma model

The finite-temperature effective potential of the O(N) linear \sigma model is studied, with emphasis on the implications for the investigation of hot hadron dynamics. The contributions from all the ``bubble diagrams'' are fully taken into account for arbitrary N; this also allows to address some long-standing issues concerning the use of non-perturbative approaches in (finite-temperature) field theory.

Note:

8 pages, LaTex Report-no: OUTP-97-10P

sigma model: linear
symmetry: O(N)
finite temperature
effective potential
perturbation theory: higher-order

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