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Universal renormalons in principal chiral models

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Bruckmann, Falk ; Puhr, Matthias
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 01 Apr 2021 15:18


Perturbative expansions in many physical systems yield "only" asymptotic series which are not even Borel resummable. Interestingly, the corresponding ambiguities point to nonperturbativc physics. We numerically verify this renormalon mechanism for the first time in two-dimensional sigma models, that, like four-dimensional gauge theories, are asymptotically free and generate a strong scale through ...


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