Cosmological Constraints on Neutrino Masses in Quintessential Inflation
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866917290619961344 |
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| author | Rodrigues, Jamerson Rodrigues, Gabriel Santos, Felipe B. M. dos da Costa, Simony Santos Alcaniz, Jailson |
| author_facet | Rodrigues, Jamerson Rodrigues, Gabriel Santos, Felipe B. M. dos da Costa, Simony Santos Alcaniz, Jailson |
| contents | Quintessential inflation provides a unified description of the early and late accelerated phases of the Universe, linking the inflationary epoch to the present-day dark energy-dominated era through a single scalar degree of freedom. In this work, we explore the implications of this unification for cosmological constraints on the sum of neutrino masses. Focusing on the $α$-attractor scenario, we implement the model in a modified version of the Boltzmann solver CLASS to compute the relevant cosmological observables and perform a Bayesian parameter estimation analysis using data from the cosmic microwave background (CMB), baryon acoustic oscillations (BAOs), and Type Ia supernovae. The model naturally breaks the degeneracy between the dark energy equation of state and the total neutrino mass, yielding tight upper bounds of $\sum m_ν< 0.067$ eV for flat spatial geometry and $\sum m_ν< 0.116$ eV when curvature is included. We also provide forecasts for future probes, showing that the Simons Observatory, LiteBIRD, and Euclid configurations may reduce the uncertainty on $\sum m_ν$ by $\approx 9\%$, while the precision on the quintessential parameter $α_{QI}$ is improved by $\approx 72\%$. These results highlight the importance of consistently accounting for neutrino mass when assessing the viability of extensions to the standard cosmological model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20349 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cosmological Constraints on Neutrino Masses in Quintessential Inflation Rodrigues, Jamerson Rodrigues, Gabriel Santos, Felipe B. M. dos da Costa, Simony Santos Alcaniz, Jailson Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology Quintessential inflation provides a unified description of the early and late accelerated phases of the Universe, linking the inflationary epoch to the present-day dark energy-dominated era through a single scalar degree of freedom. In this work, we explore the implications of this unification for cosmological constraints on the sum of neutrino masses. Focusing on the $α$-attractor scenario, we implement the model in a modified version of the Boltzmann solver CLASS to compute the relevant cosmological observables and perform a Bayesian parameter estimation analysis using data from the cosmic microwave background (CMB), baryon acoustic oscillations (BAOs), and Type Ia supernovae. The model naturally breaks the degeneracy between the dark energy equation of state and the total neutrino mass, yielding tight upper bounds of $\sum m_ν< 0.067$ eV for flat spatial geometry and $\sum m_ν< 0.116$ eV when curvature is included. We also provide forecasts for future probes, showing that the Simons Observatory, LiteBIRD, and Euclid configurations may reduce the uncertainty on $\sum m_ν$ by $\approx 9\%$, while the precision on the quintessential parameter $α_{QI}$ is improved by $\approx 72\%$. These results highlight the importance of consistently accounting for neutrino mass when assessing the viability of extensions to the standard cosmological model. |
| title | Cosmological Constraints on Neutrino Masses in Quintessential Inflation |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.20349 |