Speaker
Manuel Drees
(Bonn U.)
Description
It is argued that the SMEFT cannot be used to derive constraints on weakly-coupled heavy new particles from LHC data. Depending on the UV-complete model, the bounds derived using the SMEFT implementation can be considerably stronger or much weaker than the true constraints on the model. This is true even for an "SMEFT-friendly" scenario without 2 --> 1 resonance production. Combinatorial issues arising from the very large number of free parameters of the SMEFT are also briefly discussed.
