6533b7dafe1ef96bd126ee02
RESEARCH PRODUCT
Cosmological bounds on neutrino statistics
P. F. De SalasSergio PastorS. GariazzoM. LavederOfelia PisantiN. Truongsubject
AstrofísicaCosmology and Nongalactic Astrophysics (astro-ph.CO)Astrophysics::High Energy Astrophysical PhenomenaCosmic microwave backgroundFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsNeutrino properties01 natural sciencesPartícules (Física nuclear)symbols.namesakePauli exclusion principleHigh Energy Physics - Phenomenology (hep-ph)Big Bang nucleosynthesis0103 physical sciencesStatisticsAnisotropy010303 astronomy & astrophysicsPhysicsCosmologia010308 nuclear & particles physicsBig bang nucleosynthesisSpectrum (functional analysis)High Energy Physics::PhenomenologyObservableAstronomy and AstrophysicsCosmological neutrinos neutrino properties big bang nucleosynthesis cosmological parameters from CMBRCosmological parameters from CMBRHigh Energy Physics - Phenomenologysymbolsastro-ph.COBig bang nucleosynthesis; Cosmological neutrinos; Cosmological parameters from CMBR; Neutrino properties; astro-ph.CO; astro-ph.CO; High Energy Physics - Phenomenology; Astronomy and AstrophysicsCosmological neutrinosHigh Energy Physics::ExperimentBaryon acoustic oscillationsNeutrinoAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We consider the phenomenological implications of the violation of the Pauli exclusion principle for neutrinos, focusing on cosmological observables such as the spectrum of Cosmic Microwave Background anisotropies, Baryon Acoustic Oscillations and the primordial abundances of light elements. Neutrinos that behave (at least partly) as bosonic particles have a modified equilibrium distribution function that implies a different influence on the evolution of the Universe that, in the case of massive neutrinos, can not be simply parametrized by a change in the effective number of neutrinos. Our results show that, despite the precision of the available cosmological data, only very weak bounds can be obtained on neutrino statistics, disfavouring a more bosonic behaviour at less than $2\sigma$.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-02-13 |