Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

With the establishment and maturation of the experimental programs searching for new
physics with sizeable couplings at the LHC, there is an increasing interest in the broader …

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 …

Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting
the full scientific potential of the CERN's accelerator complex and scientific infrastructures …

Abstract Particles beyond the Standard Model (SM) can generically have lifetimes that are
long compared to SM particles at the weak scale. When produced at experiments such as …

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 …

At the dawn of a new decade, particle physics faces the challenge of explaining the mystery
of dark matter, the origin of matter over antimatter in the Universe, the apparent fine-tuning of …

We review and revise phenomenology of the GeV-scale heavy neutral leptons (HNLs). We
extend the previous analyses by including more channels of HNLs production and decay …

A bstract We present an updated and improved global fit analysis of current flavour and
electroweak precision observables to derive bounds on unitarity deviations of the leptonic …