Precision physics with a wide band super neutrino beam

Abstract

We carry out a state-of-the-art assessment of long baseline neutrino oscillation experiments with wide band beams. We describe the feasibility of an experimental program using existing high-energy accelerator facilities, a new intense wide band neutrino beam (0--6 GeV) and a proposed large detector in a deep underground laboratory. We find that a decade-long program with 1 MW operation in the neutrino mode and 2 MW operation in the antineutrino mode, a baseline as long as the distance between Fermilab and the Homestake mine (1300 km) or the Henderson mine (1500 km), and a water Cherenkov detector with fiducial mass $\ensuremath{\sim}300\text{ }\text{ }\mathrm{kT}$ has optimum sensitivity to a nonzero ${\ensuremath{\theta}}_{13}$, the mass hierarchy and to neutrino $CP$ violation at the $3\ensuremath{\sigma}$ C. L. for ${sin}^{2}2{\ensuremath{\theta}}_{13}g0.008$. This program is capable of breaking the eight-fold degeneracy down to the octant degeneracy without additional external input.