Programme of Research in Experimental Particle Physics at the University of Warwick: 2015-2019.

华威大学实验粒子物理研究计划：2015-2019。

• 批准号: ST/N000455/1
• 负责人: Paul Harrison
• 金额: $ 333.42万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FN000455%2F1
• 关键词: Programme; Research; Experimental; Particle; Physics

The scope of the proposed research lies in five distinct areas: Higgs and new phenomena searches at the ATLAS Experiment; the physics of particles containing the beauty quark at LHCb; the physics of neutrinos with T2K and SuperNEMO; accelerator research and development for new high intensity proton, muon and neutrino beams; detector R&D. It also includes Outreach and Knowledge Exchange programmes. In more detail:o The ATLAS experiment at CERN, a large, general purpose detector operating at the LHC was designed to search for and study the Higgs boson, as well as new exotic forms of matter. Our initial work will be to support the experiment by contributing to its ability to identify interesting events rapidly for recording and further analysis. We will also contribute to the detailed study of the Higgs boson which was discovered in 2012. We will do this by helping to optimise the coeection of events in which it decays to pairs of tau leptons, heavy relatives of the electron. We will also look for other, heavier exotic new bosons.o We aim to further our research into matter/anti-matter asymmetry (CP Violation) in the decays of Beautymesons at the LHCb experiment. This is important, because we have shown in past experiments thatthe leading source of CP violation at the weak scale is consistent with the Standard Model mechanismof CP violation. However, cosmological considerations indicate that there should be other sourcesof CP violation in Nature, so we aim to make further sensitive tests with beauty mesons, in orderto see if any evidence for additional sources of CP violation or other new physics in Nature may appear in such decays. We also plan to studyrare decays of B mesons, which may be able to indicate the presence of new types of interactions outside the Standard Model of particle physics.o The elucidation of the properties of neutrinos. These are very light, neutral particles which are emitted, for example, by the sun, and in radioactive beta decay. They have recently been found to oscillate, ie. transmute from one type to another, while they propagate. We have built part of the T2K experiment which is now operating in Japan. Analyses of its data recently found new types of oscillations of muon to electron type neutrinos. We aim to continue running this experiment, to better measure this newly-discovered effect, and also to search for it with anti-neutrinos. We further plan to contribute to the SuperNEMO experiment, which aims to determine the nature of the neutrino as so called Dirac or Majorana particle. The former has distinct anti-particles, while the latter is its own antiparticle. This question may be resolved by searching for double beta decay accompanied by no neutrinos. We will contribute to the analysis of data obtained by a "demonstrator module" attempting to observe such decays.o We propose to continue our research and development of high power accelerators for the generation of proton, muon and neutrino beams. We have in mind future neutrino factories, although other machines could benefit from our research. Such neutrino factories, if built, would continue to develop the theme of research into neutrino oscillations and matter-antimatter asymmetry of neutrinos as outlined above. Such machines could also bring many benefits to medicine and industry.o We propose to continue our research and development of position- and energy-sensitive detectorsfor applications in neutrino experiments and with potential spin-off applications in industry.o We will continue to develop our outreach programme which includes activities for local schoolsand articles in popular science publications.o Supported by a strong University strategy and ethos in knowledge exchange, we will continue to pursue all avenuesfor possible knowledge exchange.

拟议的研究范围涉及五个不同的领域：希格斯和新现象在ATLAS实验中的搜索；LHCb中含有美夸克的粒子的物理；T2K和SuperNEMO的中微子物理；新的高强度质子、µ子和中微子束的加速器研究和开发；探测器研发。更详细地说：o欧洲核子研究中心的ATLAS实验是在大型强子对撞机上运行的一个大型通用探测器，旨在搜索和研究希格斯玻色子以及新的奇异物质形式。我们最初的工作将是支持该实验，使其能够快速识别感兴趣的事件，以便记录和进一步分析。我们还将为2012年发现的希格斯玻色子的详细研究做出贡献。我们将通过帮助优化事件的收集来做到这一点，在这些事件中，它衰变到电子的重近亲--tau轻子对。我们还将寻找其他更重的奇异新玻色子。o我们的目标是在LHCb实验中进一步研究美丽子衰变中的物质/反物质不对称性(CP破坏)。这一点很重要，因为我们在过去的实验中已经表明，在弱尺度上CP破坏的主要来源与CP破坏的标准模型机制是一致的。然而，宇宙学的考虑表明，自然界中应该有其他CP破坏的来源，所以我们的目标是用美介子进行进一步的灵敏测试，以看看是否有任何证据表明自然界中存在其他CP破坏的来源或其他新物理。我们还计划研究B介子的罕见衰变，这可能表明在粒子物理的标准模型之外存在新类型的相互作用。这些是非常轻的中性粒子，例如由太阳发射，在放射性贝塔衰变中。他们最近被发现是振荡的，即。在它们繁殖的同时，从一种类型转化为另一种类型。我们已经建造了T2K实验的一部分，目前正在日本运行。对其数据的分析最近发现了从µ子到电子型中微子的新类型的振荡。我们的目标是继续进行这项实验，以更好地测量这一新发现的效应，并用反中微子来寻找它。我们还计划为超NEMO实验做出贡献，该实验旨在确定中微子的性质，即所谓的狄拉克或马约拉纳粒子。前者具有明显的反粒子，而后者是其自身的反粒子。这个问题可以通过寻找没有中微子伴随的双β衰变来解决。O我们建议继续研究和发展用于产生质子、介子和中微子束的高功率加速器。我们考虑的是未来的中微子工厂，尽管其他机器可能会从我们的研究中受益。如上所述，这些中微子工厂如果建成，将继续发展中微子振荡和中微子物质-反物质不对称的研究主题。O我们建议继续研究和发展位置和能量灵敏探测器，以应用于中微子实验和潜在的工业应用。o我们会继续发展外展计划，包括为本地学校举办活动和在科普刊物上发表文章。o在大学强大的知识交流策略和精神的支持下，我们会继续寻求各种可能的知识交流途径。

项目成果

Search for B c + decays to two charm mesons

搜索 B c 衰变为两个魅力介子

• DOI: 10.1016/j.nuclphysb.2018.03.015
• 发表时间: 2018
• 期刊: Nuclear Physics B
• 影响因子: 2.8
• 作者: Aaij R

Amplitude Analysis of the Decay B ¯ 0 ? K S 0 p + p - and First Observation of the C P Asymmetry in B ¯ 0 ? K * ( 892 ) - p +

衰减的幅度分析 B 0 ?

• DOI: 10.1103/physrevlett.120.261801
• 发表时间: 2018
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Aaij R