We consider the case of very low reheating scenarios T_RH ~O(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_RH > 4.1 MeV is obtained from big bang nucleosynthesis, while T_RH > 4.7 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.
Bounds on very low reheating scenarios after Planck / de Salas, P. . f.; Lattanzi, M.; Mangano, G.; Miele, Gennaro; Pastor, S.; Pisanti, Ofelia. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 92:12(2015). [10.1103/PhysRevD.92.123534]
Bounds on very low reheating scenarios after Planck
Mangano, G.;MIELE, GENNARO;PISANTI, OFELIA
2015
Abstract
We consider the case of very low reheating scenarios T_RH ~O(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_RH > 4.1 MeV is obtained from big bang nucleosynthesis, while T_RH > 4.7 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.| File | Dimensione | Formato | |
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