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The Higgs self-integration is not yet observed, which can be accessed via the Higgs-boson pair (HH) production. However, searching such production mode is very challenging as the Standard Model (SM) HH production cross-section is more than 1000 times lower than that of the single Higgs-boson production. Physics beyond the SM may enhance this process. Various searches in different Higgs decay products are being conducted at ATLAS with the Run 2 data. The 4b final states, where both Higgs decays to two b-jets, will be discussed. Such a full hadronic decay mode suffers from enormous background. A machine learning technique is used in a data-driven way to estimate the background. A combination of various decay channels will be presented and these latest results inspire confidence that the observation of the SM HH production and a precise measurement of the Higgs-boson trilinear self-coupling may be possible at the HL-LHC.
Speaker:
Dr. Rui Zhang is working with the ATLAS experiment in the University of Wisconsin-Madison, US. He obtained his Ph.D in the University of Bonn, Germany, with the research on the single top quark production at ATLAS. He had worked in the BESIII collaboration in the UCAS on the topic of a charm quark FCNC decay for the Master degree, and studied in Tianjin University for his Bachelor’s degree. His current interest includes di-higgs searches, top quark measurements, anomaly detection, machine learning of both classical and quantum.
Zoom link:
https://us06web.zoom.us/j/85496024988?pwd=QmVEVmtTWDN3c3RXeG9STXBZcSsxdz09
Zoom ID: 85496024988
Zoom password: 453818