A bstract The existence of right-handed neutrinos, or heavy neutral leptons (HNLs), is
strongly motivated by the observation of neutrino masses and mixing. The mass of these …

The electron-positron stage of the Future Circular Collider, FCC-ee, is a frontier factory for
Higgs, top, electroweak, and flavour physics. It is designed to operate in a 100 km circular …

A bstract The Dimension-5 Seesaw Portal is a Type-I Seesaw model extended by d= 5
operators involving the sterile neutrino states, leading to new interactions between all …

A bstract In this work we consider the Standard Model Effective Field Theory extended with
right-handed neutrinos, the νSMEFT, and calculate the full set of one-loop anomalous …

A bstract We study an extension of the Standard Model with electroweak scale right-handed
singlet fermions N that induces neutrino masses, plus a generic new physics sector at a …

A bstract The addition of d= 5 operators to the Seesaw model leads to the Dimension-5
Seesaw Portal. Here, two new operators provide interactions for the heavy sterile neutrinos …

The gauge singlet right-handed neutrinos (RHNs) are essential fields in several neutrino
mass models that explain the observed eV scale neutrino mass. We assume RHN field to be …

The observation of neutrino oscillations and masses motivates the extension of the standard
model with right-handed neutrinos, leading to heavy neutrino states possibly in the …

Heavy neutral leptons (HNLs) are hypothetical particles able to explain several puzzles of
fundamental physics, first and foremost-neutrino oscillations. Being sterile with respect to …

The discovery of neutrino oscillations and masses provides strong motivation to extend the
Standard Model by including right-handed neutrinos, which lead to heavy neutrino states …