publication . Article . Preprint . 2020

Relaxing cosmological neutrino mass bounds with unstable neutrinos

Escudero, Miguel; Lopez-Pavon, Jacobo; Rius, Nuria; Sandner, Stefan;
Open Access English
  • Published: 09 Jul 2020 Journal: Journal of High Energy Physics (issn: 1029-8479, Copyright policy)
  • Publisher: SpringerOpen
Abstract
At present, cosmological observations set the most stringent bound on the neutrino mass scale. Within the standard cosmological model ($\Lambda$CDM), the Planck collaboration reports $\sum m_\nu < 0.12\,\text{eV}$ at 95% CL. This bound, taken at face value, excludes many neutrino mass models. However, unstable neutrinos, with lifetimes shorter than the age of the universe $\tau_\nu \lesssim t_U$, represent a particle physics avenue to relax this constraint. Motivated by this fact, we present a taxonomy of neutrino decay modes, categorizing them in terms of particle content and final decay products. Taking into account the relevant phenomenological bounds, our an...
Subjects
arXiv: High Energy Physics::PhenomenologyHigh Energy Physics::Experiment
free text keywords: Beyond Standard Model, Cosmology of Theories beyond the SM, Neutrino Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798, High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Related Organizations
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
,
EC| InvisiblesPlus
Project
InvisiblesPlus
InvisiblesPlus
  • Funder: European Commission (EC)
  • Project Code: 690575
  • Funding stream: H2020 | MSCA-RISE
,
EC| DARKHORIZONS
Project
DARKHORIZONS
Dark Matter and the Early Universe in the LHC Era
  • Funder: European Commission (EC)
  • Project Code: 648680
  • Funding stream: H2020 | ERC | ERC-COG
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