Dec. 13, 2022 at 2 p.m. in Lorentz room (Staudingerweg 7, 5th floor)

Mathias Becker

Sebastian Schenk

Yong Xu

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.