EPE Seminar: Yulei Zhang REMOTE VIA ZOOM
PAT C-421
UW Seattle
Title: Exploring the Higgs Self-Coupling and Looking for New Physics
Abstract: This talk presents the analysis of non-resonant Higgs boson pair (HH) probing the Higgs self-coupling, using data from the ATLAS detector at the LHC with an integrated luminosity of 140 fb^(β1). It encompasses the initial results from the HH β multilepton decay channels, including both bosonic and tauonic final states, and the latest legacy analysis of π»π»βππ Μ ππ. While no evidence of HH production is observed, a 95% CL upper limit is set on the signal strength. The talk will also highlight the combined analysis of HH with single-Higgs boson production, and the most stringent 2π constraints are determined for the HHH coupling modifier, π _π. This talk further explore an extension of Higgs physics through a preliminary study on Higgs decay to long-lived particles (LLPs) in a lepton collider using advanced machine learning techniques.
Bio: Yulei Zhang, is a joint Ph.D. student between Shanghai Jiao Tong University and UniversitΓ© Paris CitΓ©, supervised by Prof. Liang Li and Dr. Gregorio Bernardi, majored in experimental particle physics. His research primarily focuses on constraining the Higgs self-coupling and probing for new physics phenomena, including long-lived particles and dark photon search. He is currently engaged in research within the ATLAS Collaboration, concentrating on di-Higgs searches, with a leading role as the note editor of the multilepton channel. Yulei Zhang has been honored with the Outstanding Graduate Student First Grade award, Outstanding Graduate, and is a recipient of the Shanghai Municipal Government Scholarship.
Recording: Β "C:\Users\lubat\Downloads\GMT20240228-003405_Recording_1920x1118 (1).mp4"
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