Particle Physics and Cosmology beyond the Standard Model

标准模型（SM）最后一个缺失部分希格斯玻色子的发现是亚原子物理学的一项重大成就。这一发现使我们的领域重新聚焦于寻找标准模型（BSM）之外的物理学。尽管SM取得了惊人的成功，但它并不是亚原子世界的最终理论，因为它无法解释中微子质量和暗物质的起源，并且面临着电弱尺度稳定性的概念困难。我提出亚原子物理学的理论研究计划，旨在找到测试 SM 的最灵敏方法，并在所有公认的基础物理前沿领域寻找 BSM：能量、强度、精度、宇宙学和暗物质物理。***我在能源前沿的工作将集中在希格斯玻色子物理及其 BSM 修改，以及具有扩展规范结构的 SM 上。这部分提案与 ATLAS 加拿大研究计划直接相关。在强度前沿，我计划通过中微子散射中的粒子产生来加强对 BSM 的研究，并继续我的光（GeV 和亚 GeV）BSM 物理研究计划。将重点关注光暗物质的探测问题，特别是我的小组和合作者首创的方法：成对产生光态，然后在大体积中微子探测器中进行探测。通过对 μ 子特性的理论研究（包括寻找解决理论与实验之间一些著名差异的方法），我的提案中以精确前沿为特色。我计划开发新实验的概念，以进一步测试μ子电子的普遍性。在宇宙学和暗物质前沿，我建议研究极光和极弱耦合场的后果，将范围从轴子扩展到暗光子，以及其他可能的光态。在地下实验（例如 SNOLAB 主办的实验）中直接检测此类光态的问题将得到解决。最后，我将继续研究修正洛伦兹不变性的引力理论，作为通向引力量子理论的可能途径。***我的研究成果将有利于加拿大科学：将训练大量的HQP，并可能发现亚原子物理研究新的可能方向。 **

The discovery of the last missing piece of the Standard Model (SM), the Higgs boson, is a momentous achievement for subatomic physics. This discovery refocusses our field toward searches for physics beyond the Standard Model (BSM). Despite its astounding success, the SM is not the final theory of the subatomic world, as it leaves unexplained the origin of neutrino masses and dark matter, and faces conceptual difficulties with the stability of electroweak scale. I am proposing theoretical research program in subatomic physics that aims at finding the most sensitive way of testing SM and searching for BSM at all recognized frontiers of fundamental physics: energy, intensity, precision, cosmology and dark matter physics.***My efforts at the energy frontier will be focused on the Higgs boson physics, and its BSM modifications, as well as on the SM with extended gauge structures. This part of the proposal directly relates to the ATLAS Canada research program. At the intensity frontier I plan to intensify the studies of BSM via particle production in neutrino scattering, as well as continue my research program on light (GeV and sub-GeV) BSM physics. Significant attention will be paid to the problem of detection of light dark matter, especially to the method pioneered by my group and collaborators: pair production of light states followed by their detection in the large volume neutrino detectors. The precision frontier is featured in my proposal through theoretical studies of the properties of the muons (including a search for resolution to some famous discrepancies between theory and experiment). I plan to develop concepts for new experiments that will further test the muon-electron universality. At cosmology and dark matter frontier, I propose to study consequences of very light and very weakly coupled fields, expanding the range from axions to dark photons, and to other possible light states. The question of direct detection of such light states in the underground experiments, such as those hosted by SNOLAB, will be addressed. Finally, I will continue my investigations into gravitational theories with modified Lorentz invariance, as a possible pathway to the quantum theory of gravity.***The outcome of my research will be beneficial to Canadian science: a large number of HQP will be trained, and new possible directions for subatomic physics research possibly uncovered. **