Briefing Book for the Zeuthen Workshop

On Jun 18th 2004, the CERN Council, upon the initiative of its President, Prof. Enzo Iarocci, established an ad hoc scientific advisory group (the Strategy Group), to produce a draft strategy for European particle physics, which is to be considered by a special meeting of the CERN Council, to be held in Lisbon on Jul 14th 2006. There are three volumes to the Briefing Book. This second volume contains input that the Preparatory Group has received. The structure of this volume of the Briefing Book is summarised here. In the following chapter we collect the documents received as input to the Strategy Group from individual scientists, collaborations, working groups, etc. Most of these documents were submitted before the Orsay Open Symposium, and contributed to the material presented by the Symposium speakers, and to the ensuing discussions. They are reproduced here unedited, and grouped by topic following the chapter subdivision of Briefing Book 1, Part 1. Chapter 3 presents contributions received from national scientific communities, from laboratories and from funding agencies. These range from general statements, to detailed road maps for the field. Some of these documents were prepared specifically for the Strategy Group evaluation, others were pre-existing, and others reflect the current status of studies in progress. In this last case, the web-based version of Briefing Book 2 http://cern.ch/council-strategygroup/BB2.html contains links to the most up-to-date version of these documents. Chapter 4 collects the reports emerged from recent Committee reviews, both in the field of elementary particle physics, and in the research areas covered by the Committees present as observers in Zeuthen, ApPEC and NuPECC. Reviews which are currently in progress are also listed, and the relative links to the updated materials is available from the web-based version of Briefing Book 2. Finally, we would like here to acknowledge the support given by CERN staff to the Preparatory Group and in the production of this volume; without them, this could not have been done in the time available.