Exploring the inert doublet model of dark matter with very high-energy gamma-rays observatories

• Ano de defesa: 2024
• Autor(a) principal: Justino, Lucca Radicce
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Astronomia de raios gama; Dark matter; Detecção indireta; Gamma-ray astronomy; Indirect detection; Inert doublet model; Matéria escura; Modelo de dubleto inerte
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/76/76134/tde-12062024-114530/

One of the most intriguing problems in particle physics and cosmology nowadays is the so-called dark matter problem. We have several evidences, like galaxy rotation curves, galaxy cluster collision, baryon acoustic oscillation, structure formation, among others, implying that we need a new particle, beyond the standard model of particle physics, to explain the major matter component of the universe and to address all these evidences. One primary direction for dark matter searches is for Weakly Interacting Massive Particles (WIMPs). These are particles with masses in the GeV - TeV range and weak-scale interaction strength. The attempts to discover the dark matter particle could be via collider, direct and indirect detection searches. In the indirect scenario, dark matter particles may self-annihilate on stable standard model particles, such as neutrinos, cosmic rays and gamma rays, which can be detected by experiments on Earth. In the WIMP paradigm, a viable model for dark matter particles must predict the observed abundance as a thermal relic of the early universe through a freeze-out mechanism. Indirect detection searches can give constraints in the parameter space of velocity-averaged annihilation cross-section (σannυ) versus the dark matter particle mass, and are complementary to relic abundance and direct detection limits. In this work, we study the phenomenology of a specific model of dark matter particle, the Inert Doublet Model, and evaluate the sensitivity of gamma-ray observatories (like HESS and CTA) to detect an annihilation signal in the Galactic Center region.