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Shedding light on new physics with Effective Field Theories

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If you have a question about this talk, please contact Francesco Coradeschi .

Effective Field Theories (EFTs) are a powerful tool for investigating the presence of new physics beyond the Standard Model. I will briefly review the status of the Standard Model Effective Field Theory and discuss a few aspects of how its parameters can be constrained with global fit analyses, while trying to minimize the assumptions on UV physics. As a case study I will show the results of a fit to electroweak data, that exhibits instructive features, among which the presence of two combinations of Wilson coefficients that remain unconstrained when the analysis is restricted to 2 → 2 scattering processes and whose origin can be understood in terms of a reparameterization invariance.

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

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