Consolidated Grant

实验粒子与天体粒子物理 (EPAP) 小组的目标是通过研究基本粒子的性质来解决我们理解物质中的一些主要的开放性问题。特别是，我们的目标是解决中微子领域的许多悬而未决的问题。我们还继续寻找新的物理学，解决包括质子衰变、超光暗物质和天体源引力波在内的现象。通过我们长期参与日本实验计划：T2K、超级神冈和超神冈，我们致力于结合束流和大气中微子样本进行精确中微子振荡测量，旨在最终了解轻子CP破坏对解释物质反物质的贡献我们宇宙的不对称性。为了促进成功的测量，我们正在寻求对相关中微子相互作用截面（特别是电子中微子截面）、探测器响应和系统不确定性的详细了解。我们还通过开发分析大量数据所需的计算软件基础设施和维护超级神冈探测器的外部探测器来支持这些努力。我们还在加拿大的 SNO 实验中发挥了重要作用，该实验将在此资助期间收集其主要数据以搜索无中微子双贝塔衰变，从而探测中微子的性质和质量。我们的工作将通过分析协调和对时间相关背景和探测器响应的仔细研究来实现这一和其他关键测量（例如进一步探测振荡参数的太阳和反应堆中微子光谱）。通过 IceCUBE，我们访问中微子能谱的非常高端，准备和搜索天体物理中微子样本中的新物理，并限制大气中微子数据的洛伦兹破坏。该小组的另一个目标是寻找质子衰变，受到许多统一理论的推动，将广泛的现象学专业知识与我们在 Super-K 和 Hyper-K 方面的实验经验相结合。更多新物理学将通过原子干涉仪观测网络（AION）得到解决。我们对开发这一系列位于英国的量子干涉仪探测器的贡献，以探索超轻暗物质候选者并探测来自天体物理源的引力波，将涉及详细的灵敏度研究，以便为设计提供信息。

The aim of the Experimental Particle & Astroparticle Physics (EPAP) group is to address some of themajor open questions in our understanding of matter through the study of the nature of fundamentalparticles. In particular, we aim to address many of the open questions in the neutrino sector. Wealso continue to search for new physics, addressing phenomena including proton decay, ultra-light darkmatter and gravitational waves from astrophyiscal sources.Through our long-standing involvement in the Japanese programme of experiments: T2K,Super-Kamiokande and Hyper-Kamiokande, we work on precision neutrino oscillation measurementscombining both beam and atmospheric neutrino samples, aiming to ultimately understand thecontribution of leptonic CP violation towards explaining the matter-antimatter asymmetry of ouruniverse. To facilitate successful measurements, we are pursuing a detailed understanding ofrelevant neutrino interaction cross-sections (in particular electron neutrino cross-sections),detector response and systematic uncertainties. We also support these efforts by developing thecomputing software infrastructure required to analyse the large data volumes and maintaining theouter detector for Super-Kamiokande.We also play an important role in the SNO+ experiment in Canada, which will collect its main datato search for neutrino-less double beta decay, hence probing the nature and mass of the neutrino,during this grant period. Our work will enable this and other key measurements (such as solar andreactor neutrino spectra that further probe oscillation parameters) through analysis coordinationand a careful study of time correlated backgrounds and detector response.Through IceCUBE we access the very high end of the neutrino energy spectrum, preparing andsearching for new physics within, the astrophysical neutrino sample, and placing limits on Lorentzviolation from atmospheric neutrino data.Another goal of the group is the search for proton-decay, motivated by many unified theories,combining extensive phenomenological expertise with our experimental experience in Super-K andHyper-K. Further new physics will be addressed through the Atomic Interferometer ObservatoryNetwork (AION). Our contributions to the development of this series of UK-based quantum interferometerdetectors to explore ultra-light dark matter candidates and detect gravitational waves fromastrophysical sources, will involve detailed sensitivity studies to inform the design.