A new design for the CERN-Fr\'ejus neutrino Super Beam

TL;DR

This paper proposes an optimized hadron focusing system for a high-power neutrino Super Beam at CERN, enhancing sensitivity to neutrino oscillation parameters using a novel multiple horn configuration and advanced simulation techniques.

Contribution

It introduces a new multiple horn focusing system with solid targets and a GEANT4-based simulation for improved neutrino flux optimization.

Findings

Enhanced sensitivity to θ13 and δCP parameters.

Effective optimization of the focusing system.

Potential for improved neutrino oscillation measurements.

Abstract

We present an optimization of the hadron focusing system for a low-energy high-intensity conventional neutrino beam (Super-Beam) proposed on the basis of the HP-SPL at CERN with a beam power of 4 MW and an energy of 4.5 GeV. The far detector would be a 440 kton Water Cherenkov detector (MEMPHYS) located at a baseline of 130 km in the Fr\'ejus site. The neutrino fluxes simulation relies on a new GEANT4 based simulation coupled with an optimization algorithm based on the maximization of the sensitivity limit on the $\theta_{13}$ mixing angle. A new configuration adopting a multiple horn system with solid targets is proposed which improves the sensitivity to $\theta_{13}$ and the CP violating phase $\delta_{CP}$.