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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2407.10965 |
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| _version_ | 1866909491653509120 |
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| author | Elbers, Willem Frenk, Carlos S. Jenkins, Adrian Li, Baojiu Pascoli, Silvia |
| author_facet | Elbers, Willem Frenk, Carlos S. Jenkins, Adrian Li, Baojiu Pascoli, Silvia |
| contents | The latest cosmological constraints on the sum of the neutrino masses depend on prior physical assumptions about the mass spectrum. To test the accordance of cosmological and laboratory constraints in the absence of such priors, we introduce an effective neutrino mass parameter that extends consistently to negative values. For the $Λ$CDM model, we analyze data from Planck, ACT, and DESI and find a $2.8-3.3σ$ tension with the constraints from oscillation experiments. Motivated by recent hints of evolving dark energy, we analyze the $w_0w_a$ and mirage dark energy models, showing that they favour larger masses consistent with laboratory data, respectively $\sum m_{ν,\mathrm{eff}} = 0.06_{-0.10}^{+0.15}\,\mathrm{eV}$ and $\sum m_{ν,\mathrm{eff}} = 0.04_{-0.11}^{+0.15}\,\mathrm{eV}$ (both at 68%). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_10965 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Negative neutrino masses as a mirage of dark energy Elbers, Willem Frenk, Carlos S. Jenkins, Adrian Li, Baojiu Pascoli, Silvia Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology The latest cosmological constraints on the sum of the neutrino masses depend on prior physical assumptions about the mass spectrum. To test the accordance of cosmological and laboratory constraints in the absence of such priors, we introduce an effective neutrino mass parameter that extends consistently to negative values. For the $Λ$CDM model, we analyze data from Planck, ACT, and DESI and find a $2.8-3.3σ$ tension with the constraints from oscillation experiments. Motivated by recent hints of evolving dark energy, we analyze the $w_0w_a$ and mirage dark energy models, showing that they favour larger masses consistent with laboratory data, respectively $\sum m_{ν,\mathrm{eff}} = 0.06_{-0.10}^{+0.15}\,\mathrm{eV}$ and $\sum m_{ν,\mathrm{eff}} = 0.04_{-0.11}^{+0.15}\,\mathrm{eV}$ (both at 68%). |
| title | Negative neutrino masses as a mirage of dark energy |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.10965 |