Neutrino evolution and quantum decoherence

Abstract

Neutrino interactions with an external environment can influence the neutrino oscillation pattern and the oscillations can be damped as a result of the neutrino quantum decoherence. In particular, the quantum decoherence of neutrino states engendered by the neutrino radiative decay accounting for the nonstandard interactions (NSI) leads to the suppression of flavor neutrino oscillations in the solar neutrino fluxes.

Neutrino decay processes and flavour oscillations

“…Neutrino decay processes and flavour oscillations Konstantin Stankevich In our previous studies [1][2][3][4] in the derivation of the neutrino oscillation probabilities we have developed a new formalism, based on quantum electrodynamics of open systems [5], to account the effect of quantum decoherence due to the neutrino radiative decay 𝜈 → 𝜈 + 𝛾 in a specific case of the electron media [6]. In this paper we generalize our consideration and show that the developed formalism can be applied to account for the neutrino radiative decay in an external electromagnetic field in the case of the most general neutrino-photon couplings.…”