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| Format: | Preprint |
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2022
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| Online Access: | https://arxiv.org/abs/2212.13146 |
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| _version_ | 1866916183042686976 |
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| author | Gao, Li-Yang Xue, She-Sheng Zhang, Xin |
| author_facet | Gao, Li-Yang Xue, She-Sheng Zhang, Xin |
| contents | We consider a new cosmological model (called $\tildeΛ$CDM) in which the vacuum energy interacts with matter and radiation, and test this model using the current cosmological observations. Using the CMB+BAO+SN (CBS) dataset to constrain the model, we find that $H_0$ and $S_8$ tensions are relieved to $2.87σ$ and $2.77σ$, respectively. However, in this case, the $\tildeΛ$CDM model is not favored by the data, compared with $Λ$CDM. We find that when the $H_0$ and $S_8$ data are added to the data combination, the situation is significantly improved. In the CBS+$H_0$ case, the model relieves the $H_0$ tension to $0.47σ$, and the model is favored over $Λ$CDM. In the CBS+$H_0$+$S_8$ case, we obtain a synthetically best situation, in which the $H_0$ and $S_8$ tensions are relieved to $0.72σ$ and $2.11σ$, respectively. In this case, the model is most favored by the data. Therefore, this cosmological model can greatly relieve the $H_0$ tension and simultaneously effectively alleviate the $S_8$ tension. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_13146 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Dark energy and matter interacting scenario to relieve $H_0$ and $S_8$ tensions Gao, Li-Yang Xue, She-Sheng Zhang, Xin Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We consider a new cosmological model (called $\tildeΛ$CDM) in which the vacuum energy interacts with matter and radiation, and test this model using the current cosmological observations. Using the CMB+BAO+SN (CBS) dataset to constrain the model, we find that $H_0$ and $S_8$ tensions are relieved to $2.87σ$ and $2.77σ$, respectively. However, in this case, the $\tildeΛ$CDM model is not favored by the data, compared with $Λ$CDM. We find that when the $H_0$ and $S_8$ data are added to the data combination, the situation is significantly improved. In the CBS+$H_0$ case, the model relieves the $H_0$ tension to $0.47σ$, and the model is favored over $Λ$CDM. In the CBS+$H_0$+$S_8$ case, we obtain a synthetically best situation, in which the $H_0$ and $S_8$ tensions are relieved to $0.72σ$ and $2.11σ$, respectively. In this case, the model is most favored by the data. Therefore, this cosmological model can greatly relieve the $H_0$ tension and simultaneously effectively alleviate the $S_8$ tension. |
| title | Dark energy and matter interacting scenario to relieve $H_0$ and $S_8$ tensions |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2212.13146 |