Nuclear and Particle Physics Colloquium 128

(核与粒子物理学术报告会128)

Place: Shahe Campus C826

Time：10:00-11:00, Oct. 11, 2023

Title:  The Top-Higgs Coupling: A Key to Inferring Higgs Physics

Speaker:  韩朔 (美国劳伦斯伯克利国家实验室博士后)

Abstract:

Within the Standard Model, the top quark is the most massive fundamental particle. The top-Higgs Yukawa coupling is essential not only for maintaining vacuum stability but also provides valuable insights into the Higgs boson's overall width and its CP properties. Additionally, the Di-Higgs production process is primarily influenced by top quark loops. It's speculated that in numerous theoretical models extending beyond the Standard Model, the top-Higgs coupling could see alterations. In this presentation, I will show the most accurate measurements of Higgs boson properties by studying the Yukawa coupling between the top quark and both on-shell and off-shell Higgs bosons, during proton-proton collisions using the ATLAS detector at the LHC.

Moreover, I will discuss the future measurements of Higgs properties in forthcoming collider experiments. This includes yet-to-be-determined properties such as Higgs self-coupling, the combined measurements across multiple experiments, and the adoption of newest analytical methodologies, in the context of the HL-LHC and the future colliders like the CEPC.

About speaker:

Dr. Shuo Han is currently serving as a postdoctoral researcher at the Lawrence Berkeley National Laboratory (LBNL). Over the past 4 years, he has been at the forefront of leading Higgs property measurements in the diphoton final state, as well as directing searches for the Standard Model multi-top productions with the ATLAS experiment. Furthermore, he is responsible for the pre-production procedures of the ATLAS inner tracker upgrade at the LBNL. Dr. Han obtained his Ph.D. degree from the Institute of High Energy Physics, Chinese Academy of Science (IHEP), in 2019. His doctoral thesis revolved around the photon identification with the ATLAS detector and the searches for Higgs production in the Z boson plus photon final state. Currently, his interests encompass the precise measurements of the top-Higgs coupling, the searches for Beyond Standard Model physics, the novel machine learning applications in physics analyses, and the silicon tracking detectors.