This content originally appeared on HackerNoon and was authored by Phenomenology Technology
Table of Links
2 Dark matter through ALP portal and 2.1 Introduction
2.3 Existing constraints on ALP parameter space
3 A two component dark matter model in a generic 𝑈(1)𝑋 extension of SM and 3.1 Introduction
3.3 Theoretical and experimental constraints
3.4 Phenomenology of dark matter
3.5 Relic density dependence on 𝑈(1)𝑋 charge 𝑥𝐻
4 A pseudo-scalar dark matter case in 𝑈(1)𝑋 extension of SM and 4.1 Introduction
4.3 Theoretical and experimental constraints
\ Appendices
D Feynman diagrams in two-component DM model
4.3 Theoretical and experimental constraints
We discuss the relevant theoretical and experimental constraints in this section.
4.3.1 Vacuum Stability condition
The scalar potential 𝑉(𝐻, Φ, 𝜒) must be bounded from below [195] and it can be determined from the following symmetric matrix which comes from the quadratic part of the potential,
\
\ Above matrix will be positive-definite if following conditions are satisfied,
\
4.3.2 Invisible Higgs width constraint
In our model, ℎ1 scalar is SM Higgs by choice, which is the mixed state of three real scalar fields from eq. 4.6.
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4.3.3 Relic density constraint
The relic density bound is from Planck satellite data [49].
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\ Any DM candidate must satisfy the relic bound given in equation 4.42.
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:::info This paper is available on arxiv under CC BY 4.0 DEED license.
:::
:::info Author:
(1) Shivam Gola, The Institute of Mathematical Sciences, Chennai.
:::
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This content originally appeared on HackerNoon and was authored by Phenomenology Technology
Phenomenology Technology | Sciencx (2025-02-21T02:51:38+00:00) A Phenomenological Study: Discussing the Relevant Theoretical and Experimental Constraints. Retrieved from https://www.scien.cx/2025/02/21/a-phenomenological-study-discussing-the-relevant-theoretical-and-experimental-constraints/
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