6533b7ddfe1ef96bd1274904
RESEARCH PRODUCT
Lepton number asymmetries and the lower bound on the reheating temperature
Wan-il ParkGabriela Barenboimsubject
PhysicsParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsmedia_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyFOS: Physical sciencesAstronomy and AstrophysicsNeutrino decouplingAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesLepton numberUpper and lower boundsUniverseGeneral Relativity and Quantum Cosmology0103 physical sciencesHigh Energy Physics::ExperimentNeutrino010303 astronomy & astrophysicsmedia_commonAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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 $2 \ {\rm MeV}$ if the reheating takes place through non-hadronic decays of the dominant matter and neutrino-antineutrino asymmetries are still large enough, $|L| \gtrsim \mathcal{O}(10^{-2})$ (depending on the neutrino flavor) at the end of reheating.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-08-16 | Journal of Cosmology and Astroparticle Physics |