Four species neutrino oscillations at $\nu$-Factory: sensitivity and CP-violation

TL;DR

This paper analyzes the potential of neutrino factories to measure leptonic mixing angles and CP-violation in a scenario with three active and one sterile neutrino, highlighting experimental sensitivities and testing capabilities.

Contribution

It presents a detailed study of neutrino oscillation sensitivities and CP-violation detection prospects at neutrino factories considering a four-neutrino model.

Findings

Sensitivity to leptonic angles down to 10^{-3} with a 1 Ton detector.

Short baseline experiments can observe LSND-like oscillations.

Long baseline experiments can effectively test CP-violation through tau detection.

Abstract

The prospects of measuring the leptonic angles and CP-odd phases at a {\em neutrino factory} are discussed in the scenario of three active plus one sterile neutrino. We consider the $\nu_\mu \raw \nu_e$ LSND signal. Its associated large mass difference leads to observable neutrino oscillations at short ($\sim 1$ km) baseline experiments. Sensitivities to the leptonic angles down to $10^{-3}$ can be easily achieved with a 1 Ton detector. Longer baseline experiments ($\sim 100$ km) with a 1 Kton detector can provide very clean tests of CP-violation especially through tau lepton detection.