Evanescent Operators, Schemes, and Prescriptions

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• Marko Pesut (Zurich U.)
• Friday 13 June 2025, 16:00-17:00
• Ray Dolby Centre, Seminar Room - North (Floor: 0 A0.019).

If you have a question about this talk, please contact Terry Generet.

In the first part of the talk, I will introduce the notions of evanescent operators, evanescent schemes, and prescriptions in the context of higher-order EFT computations using dimensional regularization. These operators play a crucial role in both matching and RGE running computations, and their treatment is often cumbersome and challenging. In the second part of the talk, I will present recent work aimed at simplifying the treatment of evanescent contributions in EFT . More precisely, I will show how their contributions can be interpreted as loop corrections to four-dimensional Dirac identities (shifts), and how this perspective significantly simplifies their treatment, particularly when changing operator bases or evanescent schemes.

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

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