Joint analysis of spectral reactor neutrino experiments

TL;DR

This paper presents a joint analysis of nuclear reactor neutrino experiments, revealing three distinct oscillation parameter zones with high confidence, and compares these with regions from other neutrino experiments indicating potential new physics.

Contribution

It introduces a combined analysis approach for reactor neutrino data, identifying multiple oscillation zones and their relation to other experimental findings.

Findings

Three neutrino oscillation zones identified with 99.9% confidence

Partial overlap with regions from non-reactor experiments

Potential indication of neutrino oscillations with unusual parameters

Abstract

The analysis of experiments at nuclear reactors where inverse beta decay reaction positron spectrum was measured at different distances from reactor core is presented here. It was found that there appear three enclosed zones of neutrino oscillation parameters when joint analysis is applied on the ${\Delta}m^{2}-\sin^{2}2{\theta}$ plane. The parameters that found are partially crossed with similar regions originating from other non reactor experiments where they observed neutrino oscillations having unusual mass parameter about 1 eV^2 and amplitude about 0.04. Confidence level for observed regions achieves the value of 99.9%.