International Linear Collider Physics and Detectors (2011 Status Report)

The studies of physics and detectors for the International Linear Collider are an important parallel element to the effort for the ILC Technical Design Report. The studies comprise the physics opportunities, detector requirements, and detector development to achieve the challenging high performance demanded by the physics, as well as integration of detectors into the accelerator. The current phase of this effort began with a call for Letters of Intent (LOIs) in 2007 and will lead to the submission of Detailed Baseline Design (DBD) report together with the ILC Technical Design Report at the end of 2012. Here we summarise the current status of this process, review what it has accomplished and identify the work that still needs to be completed. This report, titled International Linear Collider Physics and Detectors: 2011 Status Report, does just this. This report begins with a discussion of the outstanding issues in physics that motivate the construction of the ILC. It describes the organisation of the LOI process, the validation of the LOIs by the International Detector Advisory Group, and the results of R&D carried out to support the detector designs. The details of the concept detectors have already been published in the LOIs, which were completed in 2009. This report will, in a complementary way, describe the status of the detector R&D for each individual detector component and the status of the physics simulation infrastructure that has been built for the detector design process. Much of this work is carried out in cooperation between the two detector concept groups. This report describes the five common task groups and two working groups that have organised these cooperative activities. Many members of the detector concept groups and the common task groups have contributed to this report. Many more people have carried out the actual work that is reviewed. The complete list of members of each detector concept group can be found from the author lists of the published LOIs. The members of the ILC physics and detector organisation are listed at the end of this document. As we are now nearing the completion of the DBD phase, we are also entering a new stage of our preparation process. The experiments at the Large Hadron Collider at CERN, Switzerland, are accumulating data and are extending our knowledge of the physics of the teraelectronvolt energy scale. The LHC results may confirm the standard model of electroweak symmetry breaking or they may deliver something completely new. In either case, we believe, the ILC will be critical to resolve the questions that the LHC programme will bring forward. In any scenario, we will need very high-quality detectors and excellent technical and simulation capabilities. This report describes the status of our work in pursuit of that goal.

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