The synergy of the golden and silver channelsat the Neutrino Factory D. Autiero, G. De Lellis, A. Donini, M. Komatsu, D. Meloni, P. Migliozzi, R. Petti, L. Scotto Lavina and F. Terranova Eur. Phys. J. C, 33 2 (2004) 243-260 Published online: 18 February 2004 DOI: 10.1140/epjc/s2004-01606-y