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 We analyse the effects of Dirac and Majorana neutrinos on leptonic decays of
muon and tau leptons using the most general four-lepton effective interaction Hamiltonian of …

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 …

In this article we study the rare B-meson decay via two on-shell almost-degenerate
Majorana Heavy Neutrinos, into two charged leptons and two pseudoscalar mesons (B^ ± → …

The extension of the standard model with new high-scale weakly coupled physics involving
right-handed neutrinos in an effective field theory framework (SMNEFT) allows for a …

Decays of heavy pseudoscalar mesons B, B c, B s, and D s at the LHCb upgrade are
considered, which produce either two equal sign muons or taus. In addition, we consider the …

A bstract We assess the ability of the Belle II experiment to probe the Dirac or Majorana
nature of a massive right-handed neutrino (RHN) N in the MeV to GeV mass range. We …

We probe the effective field theory extending the Standard Model with a sterile neutrino in B
meson decays at B factories and lepton colliders, using angular and polarization …

We study the phenomenology of $ d= 6$ dipole portal operators connecting active and
sterile neutrinos at a futuristic muon collider. These operators can be the dominant portal …

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 …