Electroweak symmetry breaking, flavour physics and ultralight Dark Matter

已知基本粒子的质谱跨越了12个数量级，从亚电子中微子到重味粒子和希格斯粒子，而未知的暗物质粒子，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，这些质量中最高的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以使引力保持一致。在这些规模差异的背后，或者在这些行业内部，是否存在某种隐藏的结构？然而，大的图景只能从小处着手，因此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；用输入的数据描述在大型强子对撞机中发现的标量粒子的特征，并利用有效场论来确定它的行为与基本粒子的接近程度。研究可能的潜在对称性，以解释费米子的世代结构，并得出现象学结果，无论是有效的场论还是测量味模型iii)寻找超轻暗物质；研究非常精确的量子设备的范围，如共磁仪和原子钟，以寻找暗物质，因为暗物质很轻，它的行为就像我们周围的背景场。利用壳层自旋J交换振幅的基础，数值搜索重力统一的解，以及使用自下而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拥有出色的专业知识，是这个雄心勃勃的项目的理想场所。

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.