Beta Beams

TL;DR

Beta Beams are a promising method for producing pure neutrino beams to enhance long-term neutrino oscillation experiments, potentially improving current limits and enabling CP violation discovery with suitable detectors and configurations.

Contribution

This paper introduces the concept of Beta Beams, discusses their baseline scenario, and explores potential performance improvements and innovative energy configurations.

Findings

Beta Beams could improve limits on $ heta_{13}$ by a factor of 200.

They could discover leptonic CP violation if certain phase and mixing angle conditions are met.

Performance can be enhanced with additional neutrino SuperBeams.

Abstract

Beta Beams could address the needs of long term neutrino oscillation experiments. They can produce extremely pure neutrino beams through the decays of relativistic radioactive ions. The baseline scenario is described, together with its physics performances. Using a megaton water Cerenkov detector installed under the Frejus, Beta Beams could improve by a factor 200 the present limits on $\sin^2{2 \thetaot}$ and discover leptonic CP violating effects if the CP phase delta would be greater than 30 degree and theta13 greater than 1 degree. These performances can be further improved if a neutrino SuperBeam generated by the SPL 4MW, 2.2 GeV, proton Linac would be fired to the same detector. Innovative ideas on higher and lower energy Beta Beams are also described.