Explaining the cosmological dark matter coincidence in asymmetric dark QCD
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866916198326730752 |
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| author | Ritter, Alexander C. Volkas, Raymond R. |
| author_facet | Ritter, Alexander C. Volkas, Raymond R. |
| contents | To properly solve the coincidence problem ($Ω_\mathrm{DM} \simeq 5Ω_\mathrm{VM}$) in a model of asymmetric dark matter, one cannot simply relate the number densities of visible and dark matter without also relating their particle masses. Following previous work, we consider a framework where the dark matter is a confined state of a dark QCD gauge group whose confinement scale is dynamically related to the QCD confinement scale by a mechanism utilising infrared fixed points of the two gauge couplings. In this work we present a new, `zero-coupling infrared fixed point' approach, which allows a larger proportion of models in this framework to generically relate the masses of the visible and dark matter particles. Due to the heavy mass scale required for the new field content, we introduce supersymmetry to the theory. We consider how these models may be incorporated in a full theory of asymmetric dark matter, presenting some example leptogenesis-like models. We also discuss the phenomenology of these models; in particular, there are gravitational wave signals which, while weak, may be measurable at future mHz and $μ$Hz detectors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_05999 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Explaining the cosmological dark matter coincidence in asymmetric dark QCD Ritter, Alexander C. Volkas, Raymond R. High Energy Physics - Phenomenology To properly solve the coincidence problem ($Ω_\mathrm{DM} \simeq 5Ω_\mathrm{VM}$) in a model of asymmetric dark matter, one cannot simply relate the number densities of visible and dark matter without also relating their particle masses. Following previous work, we consider a framework where the dark matter is a confined state of a dark QCD gauge group whose confinement scale is dynamically related to the QCD confinement scale by a mechanism utilising infrared fixed points of the two gauge couplings. In this work we present a new, `zero-coupling infrared fixed point' approach, which allows a larger proportion of models in this framework to generically relate the masses of the visible and dark matter particles. Due to the heavy mass scale required for the new field content, we introduce supersymmetry to the theory. We consider how these models may be incorporated in a full theory of asymmetric dark matter, presenting some example leptogenesis-like models. We also discuss the phenomenology of these models; in particular, there are gravitational wave signals which, while weak, may be measurable at future mHz and $μ$Hz detectors. |
| title | Explaining the cosmological dark matter coincidence in asymmetric dark QCD |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.05999 |