The relevance of the vertex bremsstrahlung photon detection in the electron-neutrino (antineutrino) electron scattering experiments at low energy

TL;DR

This paper examines how detecting vertex bremsstrahlung photons affects the measurement of electron-antineutrino-electron scattering cross sections in low-energy neutrino experiments, emphasizing its significance in reactor experiments but negligible impact in solar neutrino detection.

Contribution

It provides an analysis of the impact of vertex bremsstrahlung photon detection on low-energy neutrino-electron scattering experiments, highlighting when this effect is significant.

Findings

Reduction in cross section must be considered in high-statistics reactor experiments.

Negligible effect on pp and 7Be solar neutrino detection.

Guidance for experimental design in neutrino detection.

Abstract

We discuss the size of the electron-antineutrino electron into electron-antineutrino electron cross section reduction due to the rejection of the events with a vertex bremsstrahlung photon above a certain energy in the final state. In particular we analyze the effect in experiments designed to detect the low energy electron-antineutrino and electron-neutrino from a nuclear reactor and from the Sun. We find that such reduction has to be considered in a relatively high statistic reactor experiment, while it is negligible for pp and 7Be solar neutrino detection.