publication . Preprint . Article . Other literature type . 2017

Flavor versus mass eigenstates in neutrino asymmetries: implications for cosmology

William H. Kinney; Gabriela Barenboim; Wan-Il Park;
Open Access English
  • Published: 07 Sep 2017
Abstract
We show that, if they exist, lepton number asymmetries ($L_\alpha$) of neutrino flavors should be distinguished from the ones ($L_i$) of mass eigenstates, since Big Bang Nucleosynthesis (BBN) bounds on the flavor eigenstates cannot be directly applied to the mass eigenstates. Similarly, Cosmic Microwave Background (CMB) constraints on mass eigenstates do not directly constrain flavor asymmetries. Due to the difference of mass and flavor eigenstates, the cosmological constraint on the asymmetries of neutrino flavors can be much stronger than conventional expectation, but not uniquely determined unless at least the asymmetry of the heaviest neutrino is well constr...
Subjects
arXiv: High Energy Physics::ExperimentHigh Energy Physics::PhenomenologyHigh Energy Physics::LatticeAstrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics and Astronomy (miscellaneous), Engineering (miscellaneous), QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798, Flavor, Asymmetry, media_common.quotation_subject, media_common, Neutrino, Eigenvalues and eigenvectors, Cosmic microwave background, Astrophysics, Particle physics, Physics, Cosmology, Big Bang nucleosynthesis, Lepton number
Funded by
EC| ELUSIVES
Project
ELUSIVES
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN
,
NSF| Physics at the Frontier: Collider and Cosmology
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1417317
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
,
EC| InvisiblesPlus
Project
InvisiblesPlus
InvisiblesPlus
  • Funder: European Commission (EC)
  • Project Code: 690575
  • Funding stream: H2020 | MSCA-RISE
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