While many properties of the Higgs boson have been successfully measured with great precision after its discovery, the self-coupling of the Higgs boson has not yet been measured. It can be measured directly through Higgs boson pair production. This talk presents the result of Higgs boson pair production in bbWW∗ final state using the Run-2 data collected by the CMS detector. Reconstruction and identification of the tau lepton using machine learning algorithm will also be presented.
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