Using nu_e -> nu_tau: golden and silver channels at the Neutrino Factory

Abstract

I briefly review the source of the so-called intrinsic ambiguity and show how the combination of ``golden'' and ``silver'' channel at the Neutrino Factory can solve the problem, in the absence of other sources of degeneracies. I then relaxed the hypothesis ${\theta }_{23}=45^{\circ }$ and show how the different dependence of the two channels on ${\theta }_{23}$ can help in solving the intrinsic and ${\theta }_{23}$-octant ambiguity at the same time.

Comments: 6 pages, 7 figs. using epsfig; proceedings of the NOON 2003 Workshop, February 10-14, 2003, Kanazawa, Japan