Mapping the SMEFT onto BSM models
Ricardo Cepedello (U. Würzburg)

While the matching of specific new physics scenarios onto the SMEFT framework is a well-understood procedure, the inverse problem, going from the SMEFT to UV scenarios, is more involved and requires the development of new methods to perform a systematic exploration of models. In this talk, I will discuss a diagrammatic approach to construct in an automated way a complete set of possible BSM models, given a certain set of well specified assumptions, that can reproduce specific patterns of SMEFT operators, and illustrate its use by generating models with no tree-level contributions to four-fermion operators. These class of models, which on the SMEFT only contribute to four-fermion operators at one-loop order, can contain relatively light particles that could be discovered at the LHC in direct searches, and even accommodate a dark matter candidate. In these scenarios, there is an interesting interplay between indirect SMEFT and direct searches, combining low-energy observables with the SMEFT Higgs-fermion analyses and searches for resonances at the LHC.