Decays of spacelike neutrinos

TL;DR

This paper explores the hypothesis that neutrinos are fermionic tachyons, analyzing their decay processes and implications for solar neutrino observations, proposing an effective interaction model and comparing results with standard models.

Contribution

It introduces an effective model for tachyonic neutrino interactions and analyzes their decay processes, providing new insights into neutrino behavior and solar neutrino spectrum modifications.

Findings

Calculated decay amplitudes and lifetimes for tachyonic neutrinos.

Showed significant changes in solar neutrino energy spectrum without oscillations.

Estimated upper bounds for tachyonic neutrino properties based on experimental data.

Abstract

In this paper we consider the hypothesis that neutrinos are fermionic tachyons with helicity 1/2. We propose an effective model of interactions of these neutrinos and analyze dominant effects under the above hypothesis: the three-body neutrino decay, the radiative decay and briefly discuss beta-decay with tachyonic antineutrino. We calculate the corresponding amplitudes and the mean life time for decays, as well as the differential decay width. In addition we apply the neutrino three-body decay to the solar neutrino problem and we obtain a remarkable change of energy spectrum of the neutrino flux at the Earth ground (assuming no neutrino oscillation). We compare the results with the Standard Solar Model predictions and solar neutrino experiments to estimate an upper bound for the taonic neutrino.