Renormalons beyond the Borel plane

Abstract

The renormalon singularities are a known source of the divergent behavior of asymptotic perturbative series from field theoretical models. These singularities live in the Borel plane and are responsible for ambiguities in the physical plane. We propose that field theories can have renormalons beyond the usual first Borel plane. We show an example with a scalar field theory where, considering a chain of cat's eyes diagrams, the model develops a Gevrey-3 asymptotic series.

arXiv comment2 figures, 9 pages

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• Magnetic renormalons in a scalar self interacting $\lambda {\varphi }^4$ theory
• Thermomagnetic renormalons in a scalar self-interacting $\lambda {\varphi }^4$ theory