2020年3月10日

# Identification of perturbative ambiguity canceled against bion

• Okuto Morikawa
• ,
• Hiromasa Takaura

It was conjectured that the bion, a semi-classical object found in a
compactified spacetime, is responsible to a cancellation of the so-called
renormalon ambiguity. Contrary to the conjecture, we argue that the ambiguity
due to the bion corresponds to the proliferation of Feynman diagrams. We point
out that the amplitudes of almost all Feynman diagrams are enhanced due to
modifications of the infrared structure of perturbation theory upon an $S^1$
compactification and twisted boundary conditions. Our findings clarify the role
of the semi-classical object in resurgence structure, which has been a
controversial issue in recent years.

リンク情報
arXiv
http://arxiv.org/abs/arXiv:2003.04759
Arxiv Url
http://arxiv.org/abs/2003.04759v2
Arxiv Url
http://arxiv.org/pdf/2003.04759v2 本文へのリンクあり

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