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- W2754502962 abstract "A recently developed variational resummation technique, incorporating renormalization group properties consistently, has been shown to solve the scale dependence problem that plagues the evaluation of thermodynamical quantities, e.g., within the framework of approximations such as in the hard-thermal-loop resummed perturbation theory. This method is used in the present work to evaluate thermodynamical quantities within the two-dimensional nonlinear sigma model, which, apart from providing a technically simpler testing ground, shares some common features with Yang-Mills theories, like asymptotic freedom, trace anomaly and the nonperturbative generation of a mass gap. The present application confirms that nonperturbative results can be readily generated solely by considering the lowest-order (quasi-particle) contribution to the thermodynamic effective potential, when this quantity is required to be renormalization group invariant. We also show that when the next-to-leading correction from the method is accounted for, the results indicate convergence, apart from optimally preserving, within the approximations here considered, the sought-after scale invariance." @default.
- W2754502962 created "2017-09-25" @default.
- W2754502962 creator A5042835120 @default.
- W2754502962 creator A5045876387 @default.
- W2754502962 creator A5077135989 @default.
- W2754502962 creator A5089095021 @default.
- W2754502962 date "2017-12-12" @default.
- W2754502962 modified "2023-09-25" @default.
- W2754502962 title "Asymptotically free theory with scale invariant thermodynamics" @default.
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- W2754502962 doi "https://doi.org/10.1103/physrevd.96.116009" @default.
- W2754502962 hasPublicationYear "2017" @default.
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