The Belle II Calorimeter R&D

Belle II将在位于日本KEK实验室的高亮度SuperKEKB e+e对撞机上探测粒子物理的风味部分。物理操作将于2017年开始，目标是到2023年收集前两代b工厂（SLAC的PEP-II和KEK的KEKB）的综合光度的30倍。这个精密前沿设施将打开一个令人兴奋的窗口，在新的能量尺度上超越现有的对撞机，包括大型强子对撞机，凭借量子环修正对非常大的，尚未发现的粒子敏感。这些假设的粒子在涉及底夸克、粲夸克和τ轻子的过程的精确测量中表现出来，比如CP破坏和其他不对称、罕见的衰变，以及我们目前对物理学的理解中禁止的过程。如果在大型强子对撞机上发现新的物理现象，Belle-II上可能进行的广泛测量将以强子对撞机无法实现的方式阐明其风味结构。如果在大型强子对撞机上没有发现新的物理现象，Belle II的测量将通过发现新的现象和偏离标准模型的期望，或者通过排除新物理的可能模型，为超越标准模型的理论提供关键的指导。

Belle II will probe the flavour sector of particle physics at the high-luminosity SuperKEKB e+e- collider, located at the KEK laboratory in Japan. Physics operations will start in 2017, with the goal of collecting by 2023 thirty times the combined integrated luminosity of the two previous generation B-factories, PEP-II at SLAC and KEKB at KEK. This precision-frontier facility will open an exciting window on new energy scales beyond the reach of existing colliders, including the LHC, by virtue of quantum loops corrections that are sensitive to very massive, and as yet undiscovered, particles. These hypothesized particles manifest themselves in precision measurements of processes involving bottom and charm quarks and tau leptons, such as CP violation and other asymmetries, rare decays, and processes that are forbidden within our current understanding of physics. If new physics is discovered at the LHC, the wide range of measurements possible at Belle-II will illuminate its flavour structure in ways that are not possible at a hadron collider. If new physics is not discovered at the LHC, Belle II measurements will provide critical guidance towards beyond-the-standard-model theories by either discovering new phenomena and deviations from standard model expectations, or by excluding possible models of new physics.