Optimized Perturbation Theory at Finite Temperature --- Renormalization and Nambu-Goldstone theorem in O(N) phi^4 Theory ---

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dc.creatorChiku, S.
dc.creatorHatsuda, T.
dc.date1998-09-01
dc.date1998-12-19
dc.date.accessioned2026-07-07T04:04:41Z
dc.date.available2026-07-07T04:04:41Z
dc.descriptionThe optimized perturbation theory (OPT) at finite temperature recently developed by the present authors is reviewed by using O(N) phi^4 theory with spontaneous symmetry breaking. The method resums automatically higher loops (including the hard thermal loops) at high $T$ and simultaneously cures the problem of tachyonic poles at relatively low $T$. We prove that (i) the renormalization of the ultra-violet divergences can be carried out systematically in any given order of OPT, and (ii) the Nambu-Goldstone theorem is satisfied for arbitrary $N$ and for any given order of OPT.
dc.descriptionTalk given at ``Thermal Field Theories and Their Applications'', (Regensburg, Germany, August, 10-14, 1998). RevTeX 10 pages, with 9 eps figures
dc.identifierhttps://arxiv.org/abs/hep-ph/9809215
dc.identifierhttp://arxiv.org/abs/hep-ph/9809215
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/48197
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.subjectNuclear Theory
dc.titleOptimized Perturbation Theory at Finite Temperature --- Renormalization and Nambu-Goldstone theorem in O(N) phi^4 Theory ---
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