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Implementing a linear collider facility at CERN
“The next flagship project at CERN should be an e+e− Linear Collider spanning the centre-of- mass energy range from the Z pole into the TeV regime.” The LC Vision idea, discussed in this article, builds on the well-developed Linear Collider concepts of ILC and CLIC, and proposes a new balance of performance and cost in a context appropriate for CERN. This collider meets all of the desired criteria: a rich physics programme attentive to discovery by precision measurements, affordability and the possibility of timely implementation, and flexibility in response to new physics advances or technical developments.
Such a program can be implemented quickly with modest technology and financial risk, and remains very ambitious in its scientific goals and reach, including several possible paths for energy and luminosity upgrades. Starting the next programme within a short time after the end of the HL-LHC will allow young scientists to participate in the design and construction of the new detectors while gaining experience with data-taking and analysis on an operating collider. The author thanks Masaya Ishino, Jenny List, Tatsuya Nakada, Roman Poeschl, Aidan Robson, Steinar Stapnes, and the participants in the LC Vision Community Meeting for many fruitful discussions to develop the ideas presented here, and for important comments and suggestions on this report.
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