The production of light nuclei in the early Universe via Big Bang Nucleosynthesis (BBN), a key prediction of the hot big bang model, is a powerful probe for physics beyond the standard model of particle physics. The goal of this thesis is to reproduce the calculation of primordial light elements abundances within the standard cosmological model. In the second part, the thesis will analyze new physics scenarios with long-lived particles that decay during or after BBN, and identify parameter space regions that are in conflict with BBN.

The production of light nuclei in the early Universe via Big Bang Nucleosynthesis (BBN), a key prediction of the hot big bang model, is a powerful probe for physics beyond the standard model of particle physics. The goal of this thesis is to reproduce the calculation of primordial light elements abundances within the standard cosmological model. In the second part, the thesis will analyze new physics scenarios with long-lived particles that decay during or after BBN, and identify parameter space regions that are in conflict with BBN.

Big Bang Nucleosynthesis as a Probe of New Physics

TOMASICCHIO, SABINA GAIA
2023/2024

Abstract

The production of light nuclei in the early Universe via Big Bang Nucleosynthesis (BBN), a key prediction of the hot big bang model, is a powerful probe for physics beyond the standard model of particle physics. The goal of this thesis is to reproduce the calculation of primordial light elements abundances within the standard cosmological model. In the second part, the thesis will analyze new physics scenarios with long-lived particles that decay during or after BBN, and identify parameter space regions that are in conflict with BBN.
2023
Big Bang Nucleosynthesis as a Probe of New Physics
The production of light nuclei in the early Universe via Big Bang Nucleosynthesis (BBN), a key prediction of the hot big bang model, is a powerful probe for physics beyond the standard model of particle physics. The goal of this thesis is to reproduce the calculation of primordial light elements abundances within the standard cosmological model. In the second part, the thesis will analyze new physics scenarios with long-lived particles that decay during or after BBN, and identify parameter space regions that are in conflict with BBN.
BBN
Dark Matter
AstroparticlePhysics
Lauree magistrali
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12608/75522