Towards the european strategy for particle physics: The briefing book T. Åkesson, R. Aleksan, B. Allanach, S. Bertolucci, A. Blondel, J. Butterworth, M. Cavalli-Sforza, A. Cervera, M. de Naurois, K. Desch et al. (17 more) Eur. Phys. J. C, 51 2 (2007) 421-500 Published online: 15 June 2007 DOI: 10.1140/epjc/s10052-007-0318-3