Measuring CP-violation with a neutrino factory

TL;DR

This paper evaluates the potential of a neutrino factory to detect leptonic CP-violation within the standard three-neutrino framework, considering experimental challenges and parameter sensitivities.

Contribution

It analyzes the parameter space and experimental conditions needed to observe CP-violation at a neutrino factory, including matter effects and asymmetry measurements.

Findings

Identification of parameter regions where CP-violation can be observed.

Requirements for neutrino factory intensity and detector size.

Impact of matter effects and apparatus asymmetries on measurements.

Abstract

We discuss the prospects of observing leptonic CP-violation at a neutrino factory in the context of the standard three neutrino scenario. If the large mixing angle MSW effect turned out to account for the solar neutrino deficit, we show that observing an asymmetry between the $\reu$ and $\reub$ oscillation probabilities would represent an exciting experimental challenge. We determine the portion of the parameter space where an evidence could be found as a function of the intensity of the muon source and of the detector size for different baselines. We discuss the consequent requirements on a neutrino factory. We address the problems associated with asymmetries induced by the experimental apparatus and by matter effects. Finally, we emphasize the importance of measuring two CP-conjugated channels in order to precisely determine $\theta_{13}$.