We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a
comprehensive survey of standard model (SM) extensions. LLPs are a common prediction of …

The Majorana nature of neutrinos is strongly motivated from the theoretical and
phenomenological point of view. A plethora of neutrino mass models, known collectively as …

The existence of nonzero neutrino masses points to the likely existence of multiple Standard
Model neutral fermions. When such states are heavy enough that they cannot be produced …

Sterile neutrinos are among the most attractive extensions of the SM to generate the light
neutrino masses observed in neutrino oscillation experiments. When the sterile neutrinos …

Motivated by TeV-scale neutrino mass models, we propose a systematic treatment of heavy
neutrino (N) production at hadron colliders. Our simple and efficient modeling of the vector …

A bstract Heavy neutrinos (N) remain one of most promising explanations for the ori-gin of
neutrinos' tiny masses and large mixing angles. In light of broad advances in un-derstanding …

We present a systematic comparison of doubly charged Higgs boson production
mechanisms at hadron colliders in the context of the type II seesaw model, emphasizing the …

A bstract Majorana and pseudo-Dirac heavy neutrinos are introduced into the type-I and
inverse seesaw models, respectively, in explaining the naturally small neutrino mass. TeV …

The right-handed neutrinos within the type-I seesaw mechanism can induce large radiative
corrections to the Higgs mass, and naturalness arguments can then be used to set limits on …

The neutrino masses and flavor mixings, which are missing in the Standard Model (SM), can
be naturally incorporated in the type-I seesaw extension of the SM with heavy Majorana …