Search for Unstable Sterile Neutrinos with the IceCube Neutrino Observatory.
Journal
Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141
Informations de publication
Date de publication:
07 Oct 2022
07 Oct 2022
Historique:
received:
06
04
2022
revised:
17
08
2022
accepted:
23
08
2022
entrez:
21
10
2022
pubmed:
22
10
2022
medline:
22
10
2022
Statut:
ppublish
Résumé
We present a search for an unstable sterile neutrino by looking for a resonant signal in eight years of atmospheric ν_{μ} data collected from 2011 to 2019 at the IceCube Neutrino Observatory. Both the (stable) three-neutrino and the 3+1 sterile neutrino models are disfavored relative to the unstable sterile neutrino model, though with p values of 2.8% and 0.81%, respectively, we do not observe evidence for 3+1 neutrinos with neutrino decay. The best-fit parameters for the sterile neutrino with decay model from this study are Δm_{41}^{2}=6.7_{-2.5}^{+3.9} eV^{2}, sin^{2}2θ_{24}=0.33_{-0.17}^{+0.20}, and g^{2}=2.5π±1.5π, where g is the decay-mediating coupling. The preferred regions of the 3+1+decay model from short-baseline oscillation searches are excluded at 90% C.L.
Identifiants
pubmed: 36269964
doi: 10.1103/PhysRevLett.129.151801
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM