A Design Study for a Muon Collider complex at 10 TeV center of mass

两个设施概念被认为是通往欧洲能量前沿粒子物理未来的潜在途径：FCC hh，一个100 TeV的圆形强子对撞机和CLIC，一个3 TeV的线性轻子（即电子-正电子）对撞机。最近的欧洲加速器研发路线图包括一个新颖的选择，一个10或更多TeV的μ子对撞机，它扩大了轻子对撞机的能量范围，并承诺紧凑的尺寸，高效率和有限的成本。与强子相反，μ子是点状粒子；一个10 TeV的μ介子对撞机，在许多物理过程中，与一个100 TeV的强子对撞机有着相当的物理情况。μ介子对撞机有望带来很高的效益，但也面临着巨大的风险，因为它是同类产品中的第一个，并使用了新颖的先进技术。MuCol设计研究将解决路线图中确定的核心挑战，开发概念和技术，并演示：•μ子对撞机的物理情况是合理的，探测器系统可以产生足够的分辨率和背景拒绝；•没有任何原则性的技术问题会妨碍加速器或探测器达到令人满意的性能；•与其他等效对撞机相比，μ子对撞机提供了高度可持续的能量前沿设施；•利用与其他科学和工业研发项目的协同效应，可以为欧洲提供发现潜力和相关技术发展的领先优势。最终报告将包括对加速器和探测器综合体的利益和风险的全面评估，包括对高能物理之外的科学、工业和社会回报的评估，综合体的成本规模和可持续性以及在CERN现场实施所产生的影响。这将允许下一个欧洲粒子物理更新战略（ESPPU）过程为选择下一个在欧洲建造的大型对撞机做出明智的选择。

Two facility concepts have been considered as potential pathways to the future of particle physics at the energy frontier in Europe: FCC hh, a 100 TeV circular hadron collider and CLIC, a 3 TeV linear lepton (i.e. electron-positron) collider. The recent European Accelerator R&D Roadmap includes a novel option, a 10 or more TeV muon collider, which expands the lepton collider energy reach and promises compact dimensions, high efficiency and limited cost. Muons are point-like particles, in contrast to hadrons; a 10 TeV muon collider would have a comparable physics case, for a number of physics processes, to a 100 TeV hadron collider. The muon collider promises high benefit but also faces a significant risk, as it is the first of its kind and uses novel advanced technologies. The MuCol design study will address the core challenges identified in the Roadmap, develop the concept and technologies and demonstrate: • the physics case of the muon collider is sound and detector systems can yield sufficient resolution and rejection of backgrounds; • no principle technological issues will prevent the achievement of a satisfactory performance of the accelerator or the detectors; • the muon collider provides a highly sustainable energy frontier facility compared to other equivalent colliders; and • exploiting synergies with other scientific and industrial R&D projects, can provide Europe a leading edge in discovery potential and development of associated technologies. The final report will include a thorough assessment of benefits and risks of the accelerator and detector complex, including an evaluation of the scientific, industrial and societal return beyond high-energy physics, the cost scale and sustainability of the complex and the impact arising from an implementation on the CERN site. This will allow the next European Strategy for Particle Physics Update (ESPPU) process to make informed choices for the selection of the next large collider to be built in Europe.