Dark Matter Phenomenology: Sterile Neutrino Portal and Gravitational Portal in Extra-Dimensions

TL;DR

This paper explores dark matter phenomenology through models involving sterile neutrino and gravitational portals in extra dimensions, aiming to understand dark matter's nature and set experimental limits.

Contribution

It introduces new dark matter models involving sterile neutrino and gravitational portals within extra-dimensional frameworks, providing phenomenological analysis and experimental constraints.

Findings

Constraints on sterile neutrino portal models

Limits on gravitational portal interactions

Insights into extra-dimensional dark matter scenarios

Abstract

The Standard Model of Fundamental Interactions (SM) represents one of the most precise theories in physics. Among the predictions of the SM we find, for instance, the anomalous magnetic moment of the electron $a_e = 0.001159652181643(764)$. This prediction agrees with the experimental results to more than ten significant digits, the most accurate prediction in the history of physics. However, nowadays we have several evidences that the SM only explains $5 \%$ of the matter content of the Universe. The other $95 \%$ are composed by the so-called Dark Energy and Dark Matter. As their names suggest, the nature of these two components of the energy/matter content of the Universe is still unclear and represents one of the most important challenges for the particle physicists. In this Thesis we have focused in the study of the phenomenology of one of these mysterious components of the Universe, the Dark Matter. Although we have many evidences of its existence, this new type of matter has not been detected yet. As a consequence, the landscape of the models that can explain the Dark Matter properties is huge. In the present work we propose and study several Dark Matter models, setting limits by using experimental results.