A Review of Long-baseline Neutrino Oscillation Experiments

TL;DR

This paper reviews accelerator long-baseline neutrino oscillation experiments, highlighting their role in confirming neutrino oscillations, measuring parameters, and exploring fundamental properties like CP violation and mass hierarchy.

Contribution

It provides a comprehensive overview of all past and current long-baseline neutrino experiments, emphasizing their achievements and future sensitivities.

Findings

Confirmation of neutrino oscillations

Observation of electron neutrino appearance

Potential to determine CP phase and mass hierarchy

Abstract

A review of accelerator long-baseline neutrino oscillation experiments is provided, including all experiments performed to date and the projected sensitivity of those currently in progress. Accelerator experiments have played a crucial role in the confirmation of the neutrino oscillation phenomenon and in precision measurements of the parameters. With a fixed baseline and detectors providing good energy resolution, precise measurements of the ratio of distance/energy (L/E) on the scale of individual events have been made and the expected oscillatory pattern resolved. Evidence for electron neutrino appearance has recently been obtained, opening a door for determining the CP violating phase as well as resolving the mass hierarchy and the octant of theta23: some of the last unknown parameters of the standard model extended to include neutrino mass.