Critical behavior of the 2d scalar theory: resumming the N8LO perturbative mass gap

Critical behavior of the 2d scalar theory: resumming the N8LO perturbative mass gap

Abstract We apply the optimized perturbation theory (OPT) to resum the perturbative series describing the mass gap of the bidimensional ϕ 4 theory in the ℤ2 symmetric phase. Already at NLO (one loop) the method is capable of generating a quite reasonable non-perturbative result for the critical coup...

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Bibliographic Details
Main Authors: Gustavo O. Heymans, Marcus Benghi Pinto
Format: Article
Language:English
Published: SpringerOpen 2021-07-01
Series:Journal of High Energy Physics
Subjects:
Discrete Symmetries
Nonperturbative Effects
Online Access:https://doi.org/10.1007/JHEP07(2021)163

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