Análise da abundância e detecção direta num modelo de matéria escura

• Ano de defesa: 2015
• Autor(a) principal: Santos, Antonio Carlos Oliveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraí­ba; BR; Física; Programa de Pós-Graduação em Física; UFPB
• Palavras-chave em Português: Matéria Escura; Física de Partículas; Detecção Direta; Extensão de Gauge B - 3Le; Dark Matter; Particle physics; Direct detection of Dark Matter; B - 3Le Gauge extension; CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/5765

In this work we consider a minimal local abelian gauge group extension with charge B - 3Le anomaly-free. We add a right-handed singlet Majorana fermion plus a neutral and charged scalars, responsible for spontaneous symmetry breaking and a charged singlet scalar to provide a connection between the electron and the Majorana fermion. The aim of this model is provide a low energy theory to Dark matter as a Majorana fermion. There are several evidences of a new kind of a non-baryonic matter but its nature and properties are not well established. So, based in some experiments (in particular those that main focus is the direct detection), we are going to constraint some parameters of the model to test its feasibility in this context. We have used a computational program called micrOMEGAs (based on CalCHEP) to compute the abundance and scattering cross section between dark matter and nucleon and compare with the experimental constraints arising from Planck (abundance) and LUX (scattering cross section). We show that the results support the restrictions imposed by the observations providing future perspectives for this extension, like indirect detection of dark matter.