High energy astrophysical neutrino flux and modified dispersion relations
| Autor: | José Bazo, Mauricio Bustamante, O. G. Miranda, A. M. Gago |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics CPT symmetry Physics beyond the Standard Model High Energy Physics::Phenomenology FOS: Physical sciences Astronomy and Astrophysics Observable Cosmic ray Torsion field Atomic and Molecular Physics and Optics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Orders of magnitude (time) High Energy Physics::Experiment Neutrino Neutrino oscillation |
| Popis: | Motivated by the interest in searches for violation of CPT invariance, we study its possible effects in the flavour ratios of high-energy neutrinos coming from cosmic accelerators. In particular, we focus on the effect of an energy independent new physics contribution to the neutrino flavour oscillation phase and explore whether it is observable in future detectors. Such a contribution could be related not only to CPT violation but also to a nonuniversal coupling of neutrinos to a torsion field. We conclude that this extra phase contribution only becomes observable, in the best case, at energies greater than 10^{16.5} GeV, which is about five orders of magnitude higher than the most energetic cosmological neutrinos to be detected in the near future. Therefore, if these effects are present only in the oscillation phase, they are going to be unobservable, unless a new mechanism or source capable to produce neutrinos of such energy were detected. Accepted for publication in the Int. J. Mod. Phys. A -- Typo in online version of abstract corrected |
| Databáze: | OpenAIRE |
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