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Ramon Miravitllas Mas (University of Geneva)
Tuesday 13 September 2022, 11:30-12:30
New renormalons from analytic trans-series: Lessons from the Bethe ansatz
- đ¤ Speaker: Ramon Miravitllas Mas (University of Geneva)
- đ Date & Time: Tuesday 13 September 2022, 11:30 - 12:30
- đ Venue: No Room Required
Abstract
Renormalons are factorial divergences arising in perturbative series due to small and large momenta in loop integrals of Feynman diagrams. When perturbative computations at large order are unavailable, the position of renormalons in the Borel plane can be analyzed through the large N limit and the operator product expansion, which has been the standard lore in the past decades. In this talk, I will explain how one can extract the position of renormalons from the Bethe ansatz equations of integrable quantum field theories, and I will discuss the disagreements one finds between the Bethe ansatz result and the renormalon prediction of the operator product expansion.
Series This talk is part of the Isaac Newton Institute Seminar Series series.
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