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.

已知的基本颗粒的质谱跨越了12个从亚eV中微子质量到重型风味的数量级和希格，而未知的粒子暗物质可能比最高夸克或更轻的中微子比中微子更重的数量级。然而，这些质量中最高的仍然位于普朗克质量以下15个数量级，在那里应该出现新状态以使重力保持一致。这种量表差异背后是否存在隐藏的结构，或者在这些部门中的任何一个方面都存在隐藏的结构吗？然而，大局只能从小就可以解决，因此博士生将开始专门针对以下任何项目：i）electroweak对称性破坏和希格斯的性质；用传入的数据表征在LHC上发现的标量粒子，并利用有效的场理论来确定其表现如何作为基本ii）标准模型颗粒的风味；研究可能的基础对称性可以解释费米子的代代结构并带来现象学后果，包括有效的田间理论或测量风味的模型iii）寻找超轻的黑暗摩擦；在寻找暗物质时，研究非常精确的量子设备（例如共磁性计和原子钟）的覆盖范围，以至于它的行为就像我们周围的背景字段iv iv）重力的紫外线完成；利用基础来振幅以数值为单位化重力的解决方案，以及使用自下而上的方法来推导新状态范围的一致性约束。达勒姆（Durham）的粒子物理现象学研究所（IPPP）在标准模型及其现象学特征的理论方面具有出色的专业知识，它是这个雄心勃勃的项目的理想场所。