Particle Physics and Cosmology beyond the Standard Model

标准模型(SM)最后一块缺失的希格斯玻色子的发现，是亚原子物理学的一项重大成就。这一发现将我们的领域重新聚焦到超越标准模型(BSM)的物理研究上。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，因为它没有解释中微子质量和暗物质的起源，并面临着电弱尺度稳定性的概念上的困难。我正在提出亚原子物理学的理论研究计划，旨在找到最灵敏的方法来测试SM，并在基础物理的所有公认前沿--能量、强度、精度、宇宙学和暗物质物理--寻找BSM。*我在能量前沿的努力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。该提案的这一部分与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。人们将非常关注光暗物质的探测问题，特别是由我的团队和合作者开创的方法：成对产生光态，然后在大体积中微子探测器中进行探测。通过对介子性质的理论研究(包括寻求解决理论和实验之间的一些著名差异)，我的提议中突出了精度前沿。我计划为新的实验开发概念，以进一步测试缪子-电子的普适性。在宇宙学和暗物质前沿，我建议研究非常轻和非常弱耦合的场的后果，将范围从轴子扩展到暗光子，以及其他可能的光态。将解决在地下实验中直接检测这种光状态的问题，例如由SNOLAB主持的那些实验。最后，我将继续研究具有修正洛伦兹不变性的引力理论，作为通往量子引力理论的可能途径。*我的研究结果将对加拿大科学有利：将训练大量的HQP，并可能为亚原子物理研究发现新的可能方向。**

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. **