Physics
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ictp.rept.....m&link_type=abstract
Technical Report, International Centre for Theoretical Physics Trieste, Italy
Physics
Neutrinos, Equivalence, Active Galactic Nuclei, Cosmic Rays, High Energy Interactions, Gravitational Fields, Oscillations, Resonance
Scientific paper
Observation of ultra-high energy neutrinos, in particular detection of nu(tau), from cosmologically distant sources like Active Galactic Nuclei (AGN) opens new possibilities to search for neutrino flavor conversion. We consider the effects of Violation of the Equivalence Principle (VEP) on propagation of these cosmic neutrinos. In particular, we discuss two effects: (1) the oscillations of neutrinos due to VEP in the gravitational field of our Galaxy and in the intergalactic space; (2) resonance flavor conversion driven by the gravitational potential of AGN. We show that ultra-high energies of the neutrinos as well as cosmological distances to AGN, or strong AGN gravitational potential allow to improve the accuracy of testing of the equivalence principle by 25 orders of magnitude for massless neutrinos ((Delta)f approx. 10-41) and by 11 orders of magnitude for massive neutrinos ((Delta)f approx. 10-28 x ((Delta)m2/1eV2)). The experimental signatures of the transitions induced by VEP are discussed.
Minakata Hisakazu
Smirnov Alexei Yu.
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