Dark Matter Analysis: A Lifetime Study

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22 Feb 2025

Acknowledgements

1 Introduction to thesis

1.1 History and Evidence

1.2 Facts on dark matter

1.3 Candidates to dark matter

1.4 Dark matter detection

1.5 Outline of the thesis

2 Dark matter through ALP portal and 2.1 Introduction

2.2 Model

2.3 Existing constraints on ALP parameter space

2.4 Dark matter analysis

2.5 Summary

3 A two component dark matter model in a generic 𝑈(1)𝑋 extension of SM and 3.1 Introduction

3.2 Model

3.3 Theoretical and experimental constraints

3.4 Phenomenology of dark matter

3.5 Relic density dependence on 𝑈(1)𝑋 charge 𝑥𝐻

3.6 Summary

4 A pseudo-scalar dark matter case in 𝑈(1)𝑋 extension of SM and 4.1 Introduction

4.2 Model

4.3 Theoretical and experimental constraints

4.4 Dark Matter analysis

4.5 Summary

5 Summary

Appendices

A Standard model

B Friedmann equations

C Type I seasaw mechanism

D Feynman diagrams in two-component DM model

Bibliography

4.4 Dark Matter analysis

Benchmark : We have fixed the following independent parameters throughout the paper for the study of our pseudo scalar particle candidate to DM.

4.4.1 DM lifetime study

Figure 4.1: The relevant two and three-body decay modes for pseudo scalar DM are shown here.

4.4.2 Relic density analysis

4.4.3 Direct detection

This paper is available on arxiv under CC BY 4.0 DEED license.

Author:

(1) Shivam Gola, The Institute of Mathematical Sciences, Chennai.