Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 36: Higgs Boson: Extended Models 1

T 36.1: Vortrag

Dienstag, 22. März 2022, 16:15–16:30, T-H21

Search for heavy Higgs bosons decaying to top quark pairs using the CMS experiment — Afiq Anuar, Alexander Grohsjean, •Jonas Rübenach, Dominic Stafford, and Christian Schwanenberger — DESY, Hamburg, Germany

The discovery of the Higgs boson at the Large Hadron Collider in 2012 marked a major breakthrough for particle physics, as it permits the verification of the Higgs mechanism, a central building block of the Standard Model. However, the Standard Model still lacks explanation for many phenomena we observe throughout the universe, including dark matter. For a great number of proposed extensions, such as the minimal supersymmetric standard model, a key ingredient is the existence of additional Higgs bosons. Using data collected by CMS at the LHC at √s=13 TeV, corresponding to a luminosity of 138 fb⁻¹, a search is performed for scalar and pseudoscalar, electrically neutral bosons decaying predominantly to top quark pairs, which are assumed to further decay dileptonically. The challenges connected to this particular search, such as interference with the standard model background and unknown quantities resulting from neutrino momenta, are tackled by a full reconstruction of the top quark system and the utilization of multi-dimensional distributions arising from mass and spin information.