Can decaying vacuum solve the H_0 Tension?
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| Format: | Preprint |
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2024
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| _version_ | 1866912495518613504 |
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| author | Brito, L. S. Jesus, J. F. Escobal, A. A. Pereira, S. H. |
| author_facet | Brito, L. S. Jesus, J. F. Escobal, A. A. Pereira, S. H. |
| contents | In the present work we analyze two different models of interaction between dark energy and dark matter, also known as vacuum decay models or $Λ(t)$CDM models. In both models, when the $H_0$ parameter is constrained by the Planck distance priors, its value is compatible with a higher value of $H_0$, in agreement with SH0ES data, while simultaneously reducing the values of $Ω_m$ and $Ω_b$. In both models, we find $H_0=73.1\pm0.86$ at 68\% c.l. by combining Planck+SH0ES data. We also find the decay parameter to be $\varepsilon=0.0197^{+0.0032}_{-0.0027}$ for one model and $\varepsilon=0.0203\pm0.0034$ for the other one. From these analyses, a noninteracting model is excluded at least at $6σ$ c.l.! This shows that these types of models are promising in solving or at least alleviating the $H_0$ tension problem. Our analysis also shows a preference for the decay of vacuum into dark matter, in agreement to thermodynamic analyses. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_06756 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Can decaying vacuum solve the H_0 Tension? Brito, L. S. Jesus, J. F. Escobal, A. A. Pereira, S. H. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology In the present work we analyze two different models of interaction between dark energy and dark matter, also known as vacuum decay models or $Λ(t)$CDM models. In both models, when the $H_0$ parameter is constrained by the Planck distance priors, its value is compatible with a higher value of $H_0$, in agreement with SH0ES data, while simultaneously reducing the values of $Ω_m$ and $Ω_b$. In both models, we find $H_0=73.1\pm0.86$ at 68\% c.l. by combining Planck+SH0ES data. We also find the decay parameter to be $\varepsilon=0.0197^{+0.0032}_{-0.0027}$ for one model and $\varepsilon=0.0203\pm0.0034$ for the other one. From these analyses, a noninteracting model is excluded at least at $6σ$ c.l.! This shows that these types of models are promising in solving or at least alleviating the $H_0$ tension problem. Our analysis also shows a preference for the decay of vacuum into dark matter, in agreement to thermodynamic analyses. |
| title | Can decaying vacuum solve the H_0 Tension? |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2412.06756 |