Understanding The Universe Through Beyond The Standard Model Physics

我们宇宙的基石是基本粒子，比如质子和中子中的电子、光子和夸克。这些粒子的性质和相互作用由一种称为粒子物理标准模型(SM)的理论来描述。SM很好地解释了我们宇宙中的许多现象。然而，SM无法解释许多观察结果。我的研究计划将解决SM的以下缺点。1-大多数基本粒子通过与希格斯粒子相互作用来获得质量。中微子不会与SM中的希格斯粒子相互作用。然而，正如萨德伯里中微子天文台所显示的那样，中微子也有质量。(加拿大物理学家阿瑟·麦克唐纳因这一发现分享了2015年诺贝尔物理学奖。)这是一个明确的迹象，表明需要超越SM的物理。我将通过探索超对称理论中新粒子的相互作用来解决这个谜团，超对称理论是SM的扩展。我还将研究在高能物理实验中发现这些新理论的方法，比如大型强子对撞机(LHC)。2-SM预言，对于每个“粒子”，都有一个具有相同质量和相反量子电荷的“反粒子”。研究人员在粒子物理实验中生产和研究这些反粒子。然而，在我们的宇宙中几乎没有反物质。这个突出的谜题被称为物质-反物质不对称。我将研究新的粒子物理模型来解释这种不对称性的起源。我将研究的一个新的物理模型将把物质-反物质不对称性的产生与赋予中微子质量的物理学联系起来。我还将探索使用粒子对撞机和宇宙学观测来发现这些新理论的方法。SM不能解释暗物质，暗物质占我们宇宙中物质的80%。我们知道暗物质的存在是由于它对星系中的恒星施加的引力。然而，它与SM粒子的相互作用不是很大，如果有的话。因此，我们对它的了解非常少。我的研究涉及探索新的物理模型，可以解释暗物质的存在和丰富。我对暗物质与中微子可能的相互作用特别感兴趣，这可能会影响星系在早期宇宙中的形成方式。我的研究将探索我们如何通过天体物理观测来检测这些相互作用。加拿大是高能物理界不可或缺的一部分，其领先的发现进一步加深了我们对宇宙的理解。我的团队将为这一前沿研究议程做出贡献。

The building blocks of our universe are elementary particles, like electrons, photons, and quarks inside the proton and neutron. The properties and interactions of these particles are described by a theory called the Standard Model (SM) of particle physics. The SM works very well in explaining many phenomena in our universe. However there are many observations the SM cannot explain. My research program will address the following shortcomings of the SM. 1- Most of the elementary particles acquire their masses by interacting with the Higgs particle. Neutrinos do not interact with the Higgs particle in the SM. However neutrinos also have mass as was shown at Sudbury Neutrino Observatory. (Canadian physicist Arthur McDonald shared the 2015 Nobel Prize in physics for this discovery.) This is a clear sign of the need for physics beyond the SM. I will address this mystery by exploring the interactions of new particles in supersymmetric theories, which are extensions of the SM. I will also study ways of discovering these new theories at high energy physics experiments like the Large Hadron Collider (LHC). 2- The SM predicts that for every "particle" there is an "antiparticle" with equal mass and opposite quantum charges. Researchers produce and study these antiparticles at particle physics experiments. However there is almost no antimatter in our universe. This glaring puzzle is called the matter-antimatter asymmetry. I will study new particle physics models to explain the origins of this asymmetry. One of the new physics models I will study will connect the generation of the matter-antimatter asymmetry to the physics that gives mass to neutrinos. I will also explore ways to discover these new theories using particle colliders as well as cosmological observations. 3- The SM cannot account for dark matter, which makes up 80% of the matter in our universe. We know dark matter exists due to the gravity it exerts on stars in galaxies. However it does not interact much, if at all, with SM particles. Hence our knowledge about it is very little. My research involves exploring new physics models that can explain the existence and abundance of dark matter. I am especially interested in possible dark matter interactions with neutrinos, which can affect how galaxies formed in the early universe. My research will explore how we can detect these interactions via astrophysical observations. Canada is an integral part of the high energy physics community, with leading discoveries that further our understanding about our universe. My group will contribute to this cutting edge research agenda.