Banca de DEFESA: JOSÉ ROBERTO ALVES MOURA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOSÉ ROBERTO ALVES MOURA
DATE: 04/10/2024
TIME: 09:00
LOCAL: Plataforma Google Meet
TITLE:

Updated BBN bounds on long-lived particles from dark sectors.

KEY WORDS:

dark sectors, primordial universe, Big Bang Nucleosynthesis

PAGES: 77
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

This dissertation explores updated constraints on long-lived particles originating from dark sectors by leveraging the well-established framework ofBig Bang Nucleosynthesis (BBN). It builds on the sensitivity ofBBN to late electromagnetic injections in the primordial plasma, which can alter

the abundance of light elements. The study assumes that heavy mother particles decay, emitting energetic photons that induce electromagnetic cascades, potentially disrupting nuclei formation. By focusing on the abundances ofHelium-4 and Deuterium, the research aims to provide refined limits on the injected energy and the lifetime ofthe particle. The thesis integrates theoretical insights from particle physics and cosmology to address phenomena beyond the Standard Model, such as dark matter, ultimately contributing to our understanding of the early Universe.

COMMITTEE MEMBERS:
Interno - 1043096 - FARINALDO DA SILVA QUEIROZ
Interno - 3060853 - IZAN DE CASTRO LEÃO
Externo à Instituição - LUCIANO MELO ABREU - UFBA
Presidente - 1672854 - RAIMUNDO SILVA JUNIOR
Externo à Instituição - VALDIR BARBOSA BEZERRA - UFPB