Bounds on very low reheating scenarios after Planck

By P. F. de Salas, M. Lattanzi, G. Mangano, G. Miele, S. Pastor, O. Pisanti. 2015

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We consider the case of very low reheating scenarios [${T}_{\mathrm{RH}}\ensuremath{\sim}\mathcal{O}(\mathrm{MeV})$] 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 ${T}_{\mathrm{RH}}g4.1\text{ }\text{ }\mathrm{MeV}$ is obtained from big bang nucleosynthesis, while ${T}_{\mathrm{RH}}g4.7\text{ }\text{ }\mathrm{MeV}$ from Planck data (allowing neutrino masses to vary), the most stringent bound on the reheating temperature to date. Neutrino masses as large as 1 eV are possible for very low reheating temperatures.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e01a7c1c0408892efacb4f555088e5657953fdf8

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Citations in the corpus

MeV-scale reheating temperature and thermalization of oscillating neutrinos by radiative and hadronic decays of massive particles (2019, background): “[4] and [5] where they obtained a lower bound TRH > 2 MeV (95% C.”
Dark matter, millicharges, axion and scalar particles, gauge bosons, and other new physics with LDMX (2018, background): “The gray shaded regions are excluded by the BaBar resonance search [19] and by cosmological constraints on low reheating temperatures [139].”
New experimental approaches in the search for axion-like particles (2018, background): “No significant injection can happen after neutrino decoupling Tν ∼ 5 MeV or the accurate predictions of BBN would be spoiled [220, 221] so (3.”
Relic neutrino decoupling with flavour oscillations revisited (2016, background): “The impact of including the off-diagonal collision terms calculated with the full integrals or the simple damping prescription could be more important for other cases, such as active-sterile neutrino oscillations [35] or very low-reheating scenarios [36], where the spectral flavour distortions could”
Physics potential of the International Axion Observatory (IAXO) (2019, background): “Note that a bound on HI constrains the maximum possible reheating temperature to be TRH ∼ √ HIMPl and this is constrained to be TRH & 5 MeV by Big Bang nucleosynthesis [102–105] and Cosmic Microwave Background (CMB) arguments [106, 107] but otherwise there is no phenomenological prejudice against sm”
Refined bounds on MeV-scale thermal dark sectors from BBN and the CMB (2019, background): “[155] P.”