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T: Fachverband Teilchenphysik
T 87: Electroweak Interactions (Exp.) 2
T 87.5: Talk
Thursday, March 24, 2022, 17:20–17:35, T-H18
A Search for anomalous couplings in the hadronic decay channel of Vector Boson Scattering at the CMS experiment — Steffen Albrecht2, Thorsten Chwalek1, Nils Faltermann1, Thomas Müller1, and •Max Neukum1 — 1Institut für Experimentelle Teilchenphysik (ETP), Karlsruher Institut für Technologie (KIT) — 2Institut für Experimentalphysik, Universität Hamburg
Vector boson scattering (VBS) is the dominating process to investigate the quartic vertex of electroweak theory at the LHC. Additionally, cancellations with contributions from the Higgs boson are required to ensure unitarity. New physics in the Higgs sector may thus alter the cross section noticeably even if it is currently out of reach of direct measurements.
Deviations of couplings at high energies are formulated in an effective field theory, a bottom-up approach, which parametrizes a multitude of explicit theories. Limits on introduced parameters allow to draw conclusions regarding the strength and energy scale of new physics.
A search for anomalous couplings in the hadronic decay channel of VBS based on proton-proton collisions at a center-of-mass energy of 13 TeV is presented. Jet substructure techniques are used to distinguish between signal and background events and a three-dimensional fit supresses contributions from QCD events.