Desvendando o Setor Escuro com Novas Partículas Leves e Ocultas
DOI:
https://doi.org/10.47456/Cad.Astro.v7nEspecial.53337Palavras-chave:
Matéria Escura, Física Além do Modelo Padrão, Setores Escuros, Universo PrimordialResumo
Apesar de bem consolidado, o Modelo Padrão (MP) da física de partículas é incompleto, destacando-se a ausência de um candidato à matéria escura (ME). A falta de sinais de novas partículas pesadas impulsionou o interesse por candidatos de ME leves e fracamente interagentes, cuja produção térmica no Universo primordial requer um portal mediador. Neste trabalho, propomos um modelo onde um mediador vetorial, originado de uma simetria de gauge $U(1)_Q$, conecta o setor visível a candidatos de matéria escura inelástica (iDM). Diferente do cenário padrão de 'fóton escuro', em que os férmions do MP não são carregados sob a nova simetria, exploramos cargas $Q$ definidas por combinações de números bariônicos e leptônicos. Demonstramos que essa estrutura pode alterar o cálculo da abundância de relíquia e a fenomenologia experimental. Como resultado, tais modelos permitem 'destravar' novas janelas no espaço de parâmetros, expandindo as possibilidades de descoberta de ME para além das restrições do modelo convencional.
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Direitos autorais (c) 2026 Ana Luisa Foguel
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
