Cabibbos

Cabibbos refers to a group of theoretical extensions to the Standard Model of particle physics that aim to explain phenomena such as neutrino masses and the existence of additional fundamental forces or particles. These models typically introduce new fundamental fermions, often with masses significantly different from their Standard Model counterparts, and may also include new gauge bosons. The term "Cabibbos" is a colloquial reference to extensions that incorporate new mixing angles analogous to the Cabibbo angle, which describes the mixing between down and strange quarks.

One of the primary motivations for developing Cabibbos models is to address the observed small, non-zero masses of neutrinos. In the Standard Model, neutrinos are massless. Cabibbos models often introduce heavy, right-handed neutrinos that interact with the Standard Model neutrinos through a mechanism related to their extended fermion content and potentially new interactions. This mechanism can then generate small masses for the light neutrinos observed in experiments, often through a see-saw mechanism.

Furthermore, some Cabibbos models propose the existence of additional gauge symmetries and associated gauge bosons, which could mediate new forces or interactions beyond the electromagnetic, weak, and strong forces. These new bosons might be very massive, explaining why such interactions have not been observed at current experimental energies. The specific properties and masses of these new particles are constrained by existing experimental data, particularly from colliders like the Large Hadron Collider. Research in this area continues to explore various parameter spaces and model constructions to align with current and future experimental observations.