Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-12-05
Phys.Lett.B476:205-212,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 1 figure, final version to appear in PLB
Scientific paper
10.1016/S0370-2693(00)00157-X
Active galactic nuclei (AGN) have been suggested to be sources of very high energy neutrinos. We consider the possibility of using AGN neutrinos to test neutrino mixings. From the atmospheric, solar and laboratory data on neutrino oscillations we derive the flavour composition of the AGN neutrino flux in different neutrino mixing schemes. We show that most of the schemes considered can be distinguished from each other and the existence of a sterile neutrino can be specially tested. AGN neutrinos can also be used to test those four-neutrino scenarios where solar neutrinos oscillate into an arbitrary mixture of $\nu_s$ and $\nu_\tau$.
Bento Luis
Keränen Petteri
Maalampi Jukka
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