Radiative emission of neutrino pair free of quantum electrodynamic backgrounds

TL;DR

This paper proposes a QED background-free method for radiative emission of neutrino pairs using wave guides or photonic crystals, enabling precise neutrino property measurements by exploiting a modified dispersion relation that filters out background processes.

Contribution

It introduces a novel scheme utilizing wave guide dispersion modifications to eliminate QED backgrounds in neutrino emission experiments, facilitating new neutrino property investigations.

Findings

The scheme effectively suppresses QED background processes.

It allows selection of photon energy regions free of macro-coherent QED amplification.

The method enables precision neutrino property measurements.

Abstract

A scheme of quantum electrodynamic (QED) background-free radiative emission of neutrino pair (RENP) is proposed in order to achieve precision determination of neutrino properties so far not accessible. The important point for the background rejection is the fact that the dispersion relation between wave vector along propagating direction in wave guide (and in a photonic-crystal type fiber) and frequency is modified by a discretized non-vanishing effective mass. This effective mass acts as a cutoff of allowed frequencies, and one may select the RENP photon energy region free of all macro-coherently amplified QED processes by choosing the cutoff larger than the mass of neutrinos.