Scale Invariant Resummed Thermal Perturbative Expansions

Abstract : We illustrate how our recently developed renormalization group optimized perturbation (RGOPT) efficiently resums perturbative expansions in thermal field theories. The residual renormalization scale dependence of optimized thermodynamical quantities is drastically improved as compared to either standard perturbative expansions, or related methods such as the screened perturbation or (resummed) hard-thermal-loop perturbation. Our approach is illustrated briefly for the nonlinear sigma model, as a toy model for thermal QCD. Finally, preliminary applications of RGOPT to hard thermal loop resummation for the QCD pressure are sketched.
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Communication dans un congrès
9th Workshop "Excited QCD" 2017, May 2017, Sintra, Portugal. Acta Phys.Polon.Supp., 10 (4), pp.1099-1105, 2017, 〈10.5506/APhysPolBSupp.10.1099〉
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https://hal.archives-ouvertes.fr/hal-01669701
Contributeur : Inspire Hep <>
Soumis le : jeudi 21 décembre 2017 - 00:05:43
Dernière modification le : jeudi 11 janvier 2018 - 06:23:21

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J.L. Kneur. Scale Invariant Resummed Thermal Perturbative Expansions. 9th Workshop "Excited QCD" 2017, May 2017, Sintra, Portugal. Acta Phys.Polon.Supp., 10 (4), pp.1099-1105, 2017, 〈10.5506/APhysPolBSupp.10.1099〉. 〈hal-01669701〉

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