Higgs and Effective Field Theory - HEFT 2025

Session

Geometry / Matching

3 Jun 2025, 09:00

503/1-001 - Council Chamber (CERN)

Conveners

Geometry / Matching

• Andreas Helset (CERN)

70. Fermion geometry

Julie Pagès (University of California, San Diego)

03/06/2025, 09:00

31. Dispersive matching

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...

34. Matching On Shell-Calculator

JAVIER LÓPEZ MIRAS

03/06/2025, 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...

48. From the EFT to the UV: the complete SMEFT one-loop dictionary

Pablo Olgoso

03/06/2025, 10:10

Effective field theories (EFTs) offer an efficient framework for the search
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...