Effective Field Theories for heavy and light new physics.

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• Anke Biekötter (Mainz U.)
• Friday 17 February 2023, 16:00-17:00
• Potter Room (B1.19).

If you have a question about this talk, please contact Maeve Madigan.

Effective Field Theories (EFTs) are a versatile framework to describe the low-energy effects of heavy new physics. We will discuss EFTs built from the Standard Model (SM) fields only, known as SM effective field theory (SMEFT), as well as theories including a new light degree of freedom. For the SMEFT , we will present results from global analyses and discuss the relevance of the electroweak input scheme.

Axions and axion-like particles (ALPs) are well-motivated low-energy relics of high-energy extensions of the SM. Their weak interaction with the particles of the SM can be described through higher-dimensional operators at dimension five. The presence of an ALP provides source terms for the Wilson coefficients of the SMEFT . Making use of this ALP -SMEFT interference we will present mass-independent constraints on the couplings of an ALP to SM particles.

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

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