For two weeks in August of 2005, 668 physicists gathered in the Rocky Mountains of Colorado to study the physics, the detectors and the accelerator of the International Linear Collider. For the first time, a fully international physics and detector workshop was held in conjunction with the ILC Accelerator workshop. This joint workshop was designed expressly with international participation in all the advisory committees and in the scientific program committees that organized the accelerator, detector, and physics activities. The physics and detector workshop was hosted by the American Linear Collider Physics Group (ALCPG), while the International Linear Collider Steering Committee sponsored the Second ILC Accelerator Workshop to address both accelerator and machine-detector interface issues. The success of this endeavor owes much to the hard work of the local organizing committee, co-chaired by Ed Berger and Uriel Nauenberg, with ALCPG Co-Chairs Jim Brau and Mark Oreglia representing the physics and detector community along with accelerator community representatives Shekhar Mishra and Nan Phinney.

From the opening overview and charge to the concluding remarks, more than 700 talks were presented. Out of this meeting arose the seeds for the machine Baseline Configuration Design and the Detector Outline Documents. These proceedings attempt to capture that intensity of effort and provide a provenance for the decisions which were arrived at.

The workshop was made possible by grants from the US Department of Energy (DOE) and the US National Science Foundation (NSF). Additional financial contributions from Argonne National Laboratory, Cornell Laboratory for Elementary Particle Physics, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory, and Thomas Jefferson Laboratory to assist with workshop expenses are gratefully acknowledged. Grants from the Universities Research Association (URA) and from Stanford University subsidized the opening reception and the two workshop dinners. Support for participants from Europe was received from DESY, PPARC (UK), IN2P3 (France), and CERN.  The workshop could not have taken place without the enormous in-kind contributions from Fermilab (leadership of the secretariat, members of the secretariat and computer support teams, and equipment), SLAC (proceedings, and members of the secretariat and computer support team), and Cornell (leadership of the computer support team). The web site was developed and regularly updated by Will Ruddick from the University of Colorado.

I appreciate the dedication and professionalism of the SLAC InfoMedia Solutions staff led by Sharon West for the publication of these proceedings.

Norman A. Graf

eConf: C0508141

This work was supported in part by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515.

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