2005/02/28 by P. D. Serpico, Pasquale Dario Serpico, M. Kachelriess +1 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Atomic physics #Crystallography #Dark Matter and Cosmic Phenomena #Energy (signal processing) #Neutrino #Neutrino Physics Research #Particle physics #Physics #Quantum mechanics #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevlett.94.211102
published as Phys.Rev.Lett.94:211102,2005 · 4 pages, 2 eps figures. Enlarged discussion, references added. Matches version to appear in PRL
arxiv created 2005/05/02 · openalex publication_date 2005/06/03 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The observed excess of high-energy cosmic rays from the Galactic plane in the energy range around 1018 eV may be explained by neutron primaries generated in the photodissociation of heavy nuclei. In this scenario, lower-energy neutrons decay before reaching the Earth and produce a detectable flux in a 1 km3 neutrino telescope. The initial flavor composition of the neutrino flux, \ensuremathφ(\ensuremathνe)\ensuremath\mathbin:\ensuremathφ(\ensuremathν_\ensuremathμ)\ensuremath\mathbin:\ensuremathφ(\ensuremathν_\ensuremathτ)=1\ensuremath\mathbin:0\ensuremath\mathbin:0, permits a combined \ensuremathν_\ensuremathμ/\ensuremathν_\ensuremathτ appearance and \ensuremathνe disappearance experiment. The observable flux ratio \ensuremathφ(\ensuremathν_\ensuremathμ)/\ensuremathφ(\ensuremathνe+\ensuremathν_\ensuremathτ) at Earth depends on the 13 mixing angle \ensuremathθ13 and the leptonic CP phase \ensuremathδCP, thus opening a new way to measure these two quantities.