Lepton number asymmetries and the lower bound on the reheating temperature

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Published 22 December 2017 © 2017 IOP Publishing Ltd and Sissa Medialab
, , Citation Gabriela Barenboim and Wan-Il Park JCAP12(2017)037 DOI 10.1088/1475-7516/2017/12/037

1475-7516/2017/12/037

Abstract

We show that the reheating temperature of a matter-domination era in the early universe can be pushed down to the neutrino decoupling temperature at around 2 MeV if the reheating takes place through non-hadronic decays of the dominant matter and neutrino-antineutrino asymmetries are still large enough, |L| ≳ Script O(10−2) (depending on the neutrino flavor) at the end of reheating.

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10.1088/1475-7516/2017/12/037