Linking solar and long baseline terrestrial neutrino experiments

TL;DR

This paper explores how solar neutrino data and measurements of the mixing matrix element U_{e3} can inform each other, aiding in understanding neutrino oscillation solutions.

Contribution

It demonstrates the reciprocal relationship between solar neutrino data and U_{e3} measurements within a three-neutrino framework without fine tuning.

Findings

Solar neutrino data constrains U_{e3}

U_{e3} measurements help distinguish oscillation solutions

Framework assumes hierarchical neutrino masses

Abstract

We show that in the framework of three light neutrino species with hierarchical masses and assuming no fine tuning between the entries of the neutrino mass matrix, one can use the solar neutrino data to obtain information on the element $U_{e3}$ of the lepton mixing matrix. Conversely, a measurement of $U_{e3}$ in atmospheric or long baseline accelerator or reactor neutrino experiments would help discriminate between possible oscillation solutions of the solar neutrino problem.