Conveners
Geometry / Matching
- Andreas Helset (CERN)
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Julie Pagès (University of California, San Diego)03/06/2025, 09:00
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Gauthier Durieux (CP3 - UCLouvain)03/06/2025, 09:30
The matching of UV models on their low-energy EFT can be obtained from a dispersion relation, analogous to the one leading to positivity constraints but generalised beyond four-point amplitudes. Introduced in 2308.00035, this method is distinct from those based on the (functional) effective action and on (off- or on-shell) amplitudes. It takes cut amplitudes as input. In particular, one-loop...
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JAVIER LÓPEZ MIRAS03/06/2025, 09:50
The calculation of the Wilson coefficients of an effective field theory (EFT) for specific new physics models is usually performed by matching off-shell one-light-particle irreducible Green functions, which requires an off-shell basis of effective operators. We introduce "mosca", a Mathematica package designed to perform the much less standarized macthing on-shell. This matching procedure...
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Pablo Olgoso03/06/2025, 10:10
Effective field theories (EFTs) offer an efficient framework for the search
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of heavy physics beyond the Standard Model, using the so-called bottom-up and top-down approaches. However, the vastness of possible UV scenarios makes the connection
between the two approaches challenging in practice, especially at loop-level. UV/IR dictionaries fill precisely this gap, readily connecting the EFT...