Alessio Maiezza - Renormalons and Resurgence applied to the QCD

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• Alessio Maiezza
• Friday 11 February 2022, 16:00-17:00
• Potter Room (B1.19).

If you have a question about this talk, please contact Rene Poncelet.

The seminar will take place via Zoom here.

Abstract: We discuss both conceptual and phenomenological aspects of the QFT and the renormalization group. A focus on the ambiguities of the renormalization group, the renormalons, is provided. We show that these can be described with a resurgent approach, although their resummation is quantitatively non-unique. However, the result can be written in a determined analytical expression and parameterized with a single, arbitrary constant. In particular, we apply the theory to the QCD , describing the Adler function in the IR limit through the contribution of the resummed renormalons. The resurgent expression reproduces well the behavior of the “experimental” Adler function. With this tool at hand, we deal with the current muon g-2 discrepancy, investigating the possibility that it can be saturated by the QCD vacuum polarization function, without the need for new particles.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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