3 papers
hep-ph2026
Effective Lagrangians from functional matching
Stefan Dittmaier, Sebastian Schuhmacher, Maximilian Stahlhofen
We briefly review a variant of functional matching to derive an Effective Field Theory (EFT) for heavy particles at the one-loop level in the top-down approach. The method integrat…
hep-ph2026
Integrating out a heavy Higgs singlet: on the edge between SMEFT and HEFT
Stefan Dittmaier, Sebastian Schuhmacher, Maximilian Stahlhofen
We use a functional approach based on the background-field formalism and the expansion by regions to integrate out the heavy Higgs field (associated with the mass eigenstate H) at…
hep-ph2021
Integrating out heavy fields in the path integral using the background-field method: general formalism
Stefan Dittmaier, Sebastian Schuhmacher, Maximilian Stahlhofen
Building on an older method used to derive non-decoupling effects of a heavy Higgs boson in the Standard Model, we describe a general procedure to integrate out heavy fields in the…