Electroweak symmetry breaking, flavour physics and ultralight Dark Matter

电弱对称性破缺、风味物理和超轻暗物质

• 批准号: 2419859
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2419859
• 关键词: Electroweak; symmetry; breaking; flavour; physics

The mass spectrum of known elementary particles spans 12 orders of magnitude from sub eV neutrino masses to the heavy flavours and the Higgs whereas the unknown, particle dark matter, could be orders of magnitude heavier than the top quark or lighter than neutrinos by almost 20 orders of magnitude. Yet the highest of these masses still lies 15 orders of magnitude below the Planck mass where new states should arise to render gravity consistent. Is there a hidden structure behind this disparity of scales or within any of these sectors? The big picture however can only be addressed starting small and so PhD students would begin dedicated to any of the following projects: i) electroweak symmetry breaking and the nature of the Higgs; characterize the scalar particle found at LHC with the incoming data and making use of effective field theory to determine how closely it behaves as elementary ii) the flavour of standard model particles; study possible underlying symmetries to explain the generational structure of fermions and derive phenomenological consequences be it with effective field theory or models of gauged flavour iii) searches for ultralight dark-matter; study the reach of very precise quantum devices like co-magnetometers and atomic clocks in the search for dark matter so light that it behaves like a background field around us iv) the UV completion of gravity; making use of the basis for amplitudes of on-shell spin J exchange search numerically for solutions to the unitarization of gravity, as well as using a bottom-up approach in deriving consistency constraints on the spectrum of new states. The Institute for Particle Physics Phenomenology (IPPP) in Durham, has an outstanding expertise in the theoretical aspects of physics beyond the Standard Model and on its phenomenological signatures and it is an ideal place for this ambitious project.

已知的基本粒子的质量谱跨越了12个数量级，从亚电子伏特中微子质量到重味道和希格斯粒子，而未知的粒子暗物质可能比顶夸克重几个数量级，或者比中微子轻近20个数量级。然而，这些质量中的最高质量仍然比普朗克质量低15个数量级，在那里应该出现新的状态来使引力保持一致。在这种规模差异的背后或在这些部门中是否有一个隐藏的结构？然而，大的图景只能从小的开始，所以博士生将开始致力于以下任何一个项目：i）电弱对称性破缺和希格斯粒子的性质;用传入的数据描述在LHC发现的标量粒子，并利用有效场论来确定它的行为与基本粒子的接近程度ii）标准模型粒子的味道;研究可能的基本对称性，以解释费米子的世代结构，并得出现象学的结果，无论是与有效场论或模型的规范味iii）寻找超轻暗物质;研究非常精确的量子设备的范围，磁力计和原子钟在寻找暗物质，如此轻，它的行为就像一个背景场在我们周围iv）紫外线完成重力;利用壳层上自旋J交换振幅的基础数值求解引力的么正化，以及使用自底向上的方法推导新态谱的一致性约束。位于达勒姆的粒子物理现象学研究所（IPPP）在标准模型之外的物理学理论方面及其现象学特征方面具有杰出的专业知识，它是这个雄心勃勃的项目的理想场所。