Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 61: Higgs Boson: Decay in Bosons
T 61.8: Vortrag
Mittwoch, 23. März 2022, 18:00–18:15, T-H20
Search for non-resonant Higgs boson pair production in lepton+jets final states of the bbWW decay mode at CMS — •Mathis Frahm, Johannes Haller, Matthias Schröder, and Artur Lobanov — Institut für Experimentalphysik, Universität Hamburg
The Higgs boson self-coupling is an important parameter of the Standard Model, since it is related to the shape of the Higgs potential. At the LHC, this parameter can be probed by measuring the Higgs boson pair production (HH) cross section. In the Standard Model, HH production occurs in processes via Higgs-boson self-coupling and in processes with a fermion loop. Due to destructive interference of these two contributions, the resulting production cross section is small, amounting to only 33 fb at 13 TeV.
In this talk, a search for HH production in lepton+jets finals states of the bbWW decay mode is presented. The analysis is performed on data recorded by the CMS experiment during LHC Run 2 at a center-of-mass energy of 13 TeV, which corresponds to an integrated luminosity of 137.2 fb−1. The analysis utilizes a deep neural network to classify between signal and different background categories. Exclusion limits on the production cross section are derived as a function of the Higgs boson self-coupling strength to set constraints on this parameter.