LHCb Upgrade II: preconstruction for the ultimate LHC flavour physics experiment

LHCb探测器的第二次主要升级，LHCb升级II，将通过提供独特的探测能力，最大限度地提高高亮度LHC的发现潜力。该实验旨在利用大型强子对撞机中重味（美丽和迷人）粒子的高生产率，从而通过循环过程精确搜索标准模型之外的物理。LHCb升级II建立在LHCb实验现有基础设施的基础上，升级了所有的子探测器系统和新的元素，通过使用精确的定时信息，将提供在同一束交叉的不同碰撞中分辨粒子的能力。数据记录的速度将比目前可能的要快得多，这将导致一个广泛而令人兴奋的物理项目。该项目是英国LHCb升级II项目的一个为期三年的前期建设阶段，工期为2023年10月至2023年9月。2026年，在早期研发的基础上，完成并审查子探测器技术设计报告。预计接下来是施工阶段，随后是安装、操作和物理开发。施工前和施工阶段的资金由UKRI基础设施基金分配。英国的努力集中在具体的战略技术上，这些技术将使LHCb升级II的物理目标得以实现，同时也将产生广泛的影响。

The second major upgrade of the LHCb detector, LHCb Upgrade II, will maximise the discovery potential of the High Luminosity LHC by providing unique detection capability. The experiment is designed to exploit the high production rate of heavy flavoured (beauty and charm) particles in LHC collisions, enabling precision searches for physics beyond the Standard Model through loop processes. LHCb Upgrade II builds on the existing infrastructure of the LHCb experiment, with upgrades to all subdetector systems and new elements that will provide capability to resolve particles from different collisions in the same bunch crossing through the use of precision timing information. Data will be recorded at much higher rates than currently possible, leading to a broad and exciting physics programme. This project is a three-year preconstruction phase of UK work on LHCb Upgrade II, Oct. 2023-Sep. 2026, following and building on earlier R&D through to the completion and review of subdetector technical design reports. It is anticipated to be followed by a construction phase, and subsequent installation, operation and physics exploitation. Funding for preconstructcion and construction phases has been allocated by a UKRI Infrastructure Fund award. UK effort is focussed on specific, strategic technologies that will enable the physics goals of LHCb Upgrade II to be achieved while also achieving broad impact.