Present experimental data do not exclude fast oscillation of the neutron n to its degenerate twin from a hypothetical parallel sector, the so called mirror neutron n'. We show that this effect brings about remarkable modifications of the ultra-high energy cosmic ray spectrum testable by the present Pierre Auger Observatory and Telescope Array detector, and the future JEM-EUSO experiment. In particular, the baryon non-conservation during UHECR propagation at large cosmological distances shifts the beginning of the GZK cutoff to lower energies, while in presence of mirror sources it may enhance the spectrum at E > 100 EeV. As a consequence, one can expect a significant reduction of the diffuse cosmogenic neutrino flux.
Neutron oscillations to parallel world: earlier end to the cosmic ray spectrum?
BEREJIANI, ZOURAB
Writing – Original Draft Preparation
;
2012-01-01
Abstract
Present experimental data do not exclude fast oscillation of the neutron n to its degenerate twin from a hypothetical parallel sector, the so called mirror neutron n'. We show that this effect brings about remarkable modifications of the ultra-high energy cosmic ray spectrum testable by the present Pierre Auger Observatory and Telescope Array detector, and the future JEM-EUSO experiment. In particular, the baryon non-conservation during UHECR propagation at large cosmological distances shifts the beginning of the GZK cutoff to lower energies, while in presence of mirror sources it may enhance the spectrum at E > 100 EeV. As a consequence, one can expect a significant reduction of the diffuse cosmogenic neutrino flux.Pubblicazioni consigliate
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