The Nonsymmetric Flavor Transition Matrix and the Apparent P violation

TL;DR

This paper introduces a nonsymmetric flavor transition matrix to account for potential new physics effects in high-energy astrophysical neutrino flavor ratios, leading to the concept of apparent P violation and analyzing its dependence on mixing parameters.

Contribution

It proposes a novel nonsymmetric matrix model for neutrino flavor transitions, extending standard predictions and exploring implications for apparent P violation in astrophysical neutrinos.

Findings

The nonsymmetric matrix modifies expected flavor ratios at Earth.

Correlations identify key parameters influencing new physics effects.

Moderate source parameter setup demonstrates measurable deviations.

Abstract

The leptonic mixing parameters of high precision and the next-generation neutrino telescopes make it possible to test new physics in the flavor transition of the high-energy astrophysical neutrinos(HAN). We introduce a nonsymmetric matrix to modify the predictions of the standard flavor transition matrix. It is constructed with the mixing matrix in vacuum and that at the source of the HAN. The mismatch of the mixing matrices results in the new expectation of the flavor ratio of the HAN at Earth. It also leads to a secondary effect called the apparent P violation (APV). The quantitative analyses of the new effects are performed with a moderate setup of the parameters at the source of the HAN. The correlations between the mixing parameters and the new predictions are shown. From the correlations, the dominant parameters determining the new-physics effects are identified.