Resumming the pressure

Details Resumming the pressure Resumming the pressure

1998-08-31

arxiv.org/abs/hep-ph/9808480v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages two-column REVTEX, 7 postscript figures; talk given at the 5th International Workshop on Thermal Field Theories and Th

Scientific paper

The convergence properties of the resummed thermal perturbation series for the thermodynamic pressure are investigated by comparison with the exact results obtained in large-N phi^4 theory and possibilities for improvements are discussed. By going beyond conventional resummed perturbation theory, renormalization has to be carried out nonperturbatively yet consistently. This is exemplified in large-N phi^4_4 and in a special large-N \phi^3_6 model that mimics QED in the limit of large flavour number.

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