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      Bounds on very low reheating scenarios after Planck

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          Abstract

          We consider the case of very low reheating scenarios (\(T_{\rm RH}\sim\mathcal{O}({\rm MeV})\)) with a better calculation of the production of the relic neutrino background (with three-flavor oscillations). At 95% confidence level, a lower bound on the reheating temperature \(T_{\rm RH}>4.1\) MeV is obtained from Big Bang Nucleosynthesis, while \(T_{\rm RH}>4.3\) MeV from Planck data for very light (\(\sum m_i = 0.06\) eV) neutrinos. If neutrino masses are allowed to vary, Planck data yield \(T_{\rm RH}>4.7\) MeV, the most stringent bound on the reheating temperature to date. Neutrino masses as large as 1 eV are possible for very low reheating temperatures.

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          Oscillating neutrinos in the early Universe

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            Author and article information

            Journal
            2015-11-02
            Article
            10.1103/PhysRevD.92.123534
            1511.00672
            759af68e-6c15-4a1e-9b29-b2a4dfc5849f

            http://arxiv.org/licenses/nonexclusive-distrib/1.0/

            History
            Custom metadata
            IFIC/15-70
            Phys. Rev. D 92, 123534 (2015)
            9 pages, 9 figures
            astro-ph.CO hep-ph

            Cosmology & Extragalactic astrophysics,High energy & Particle physics
            Cosmology & Extragalactic astrophysics, High energy & Particle physics

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