Neutrino Oscillations at an Entry-Level Neutrino Factory and Beyond

Abstract

We consider the parameters of an entry-level neutrino factory designed to make the first observation of nu_e -> nu_mu oscillations, measure the corresponding amplitude sin^2 2theta_{13}, and determine the sign of the atmospheric-scale delta m_{32}^2 via matter effects. A 50 kt detector, a stored muon energy E_mu geq 20 GeV and 10^{19} muon decays would enable these goals to be met provided sin^2 2theta_{13} > 0.01. The determination of the sign of delta m_{32}^2 also requires a baseline L geq 2000 km. An upgraded neutrino factory with O(10^{20}) decays would enable the first observation of nu_e -> nu_tau oscillations. With O(10^{21}) decays the effects of a large CP-phase could be measured in the case of the large angle matter oscillation solution to the solar neutrino anomaly. Our analysis includes a family of three-neutrino models that can account for the atmospheric and solar neutrino oscillation indications.

arXiv comment24 pages, Revtex (single-spaced), 14 postscript figures, uses epsf.sty. Added comments and minor corrections to text and references. Version to be published in Phys. Rev. D

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