Um modelo de neutrino estéril candidato à Matéria Escura

• Autor(a) principal: Queiroz, Farinaldo da Silva
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/123456789/13981
• topic: Neutrinos de Majorana; Matéria Escura; Extensões Mínimas do Modelo Padrão; Física; Majorana neutrinos; Dark Matter; Minimal Extensions of the Standard Model; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA

The Dark matter problem constitutes a key question at the interface between Particle Physics, Astrophysics and Cosmology. The observational data which have been accumulated in the last years on dark matter (DM) point to the existence of an amount of non baryonic DM. Since the Standard Model (SM) does not provide any candidate for such non-baryonic dark matter, the evidence of DM is a major indication for new physics beyond the SM. We analyse in this work one of the most popular dark matter candidates, the so called WIMPS (Weakly Interactive Massive Particles). In particular SM, we will implement a minimal extension of the MP, including just one right-handed neutrino and a charged bilepton (which carries two units of lepton number), both singlet under the SU(3)c xSU(2)L xU(1)y symmetry. We will verify that this neutrino is a good candidate for WIMP and can generate the correct abundance provided by the Wilkinson Microwave Anisotropy Probe (WMAP) satellite among other experiments.