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hep-ph2026
Two portals to GeV sterile neutrinos : dipole versus mixing
Enrico Bertuzzo, Michele Frigerio
Massive sterile neutrinos, also known as heavy neutral leptons, can have a mixing with active neutrinos, , as well as a dipole coupling to the photon, . We study the interpl…
hep-ph2026
Electroweak Precision Constraints on Dark Photon Models with Generalized Mixing
Enrico Bertuzzo, Csaba Csaki, Fernanda Huller
We present a global fit to electroweak precision observables (EWPOs) in dark photon (DP) models containing both kinetic and mass mixing between the DP and the neutral gauge bosons…
hep-ph2024
Complex Dark Photon Dark Matter EFT
Enrico Bertuzzo, Tommaso Sassi, Andrea Tesi
We construct an effective field theory for complex Stueckelberg dark photon dark matter. Such an effective construction can be realized by writing down a complete set of operators…