In the Standard Model of Particle Physics, elementary particles acquire their masses through the Brout-Englert-Higgs mechanism, with the mass values determined by the strengths of their interaction with the Higgs boson. Studying the Higgs boson interaction with itself, also referred to as “Higgs self-coupling”, is crucial to the understanding of the Higgs potential. At the LHC, the Higgs boson self-coupling strength can be probed using the production of the Higgs boson pairs(HH). In this seminar, I will present an overview of the HH searches of the CMS experiment at the LHC, with a focus on one of the most sensitive channels: the HH->4b decay channel featuring a pair of boosted Higgs bosons. This novel search explores two Higgs bosons having high momentum that the decay products of each Higgs boson merge within a single large-radius jet.
Prof. Nan Lu (University of Science and Technology of China) obtained PhD in physics at the University of Michigan - Ann Arbor in 2017, working on the ATLAS experiment. Then she moved to the CMS experiment after receiving the David and Ellen Lee prize postdoctoral fellowship from Caltech. Prof. Lu’s contributions to the LHC Higgs physics studies include evidence of Higgs boson decay to a pair of muons and search for di-Higgs production in CMS, and the study of the Higgs boson couplings, spin and parity in ATLAS. She currently serves as di-Higgs contact person in CMS, as well as CMS convener of the di-Higgs subgroup under the LHC Higgs Working Group.
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