Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 61: Search for New Particles III
T 61.3: Talk
Wednesday, March 17, 2021, 16:30–16:45, Tk
A multi-dimensional search for new heavy resonances decaying to boosted WW, WZ, ZZ, WH or ZH boson pairs in the all jets final state at 13 TeV — •Irene Zoi1, Anna Benecke1, Andreas Hinzmann1, Robin Aggleton1, and Daniela Schaefer2 — 1Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Deutschland — 2KIT
The standard model (SM), the best to date description of elementary particles and their interactions, still has open questions, such as the hierarchy problem. In the attempt to solve this issue, extensions of the SM predict the existence of new massive resonances. Here a search for such resonances decaying to two bosons (WW, WZ, ZZ, WH or ZH), where the vector bosons decay hadronically and the Higgs boson decays into pairs of bottom quarks is presented. Multiple resonance production modes are investigated, for the first time also vector-boson fusion is considered in this search. The analysis is performed on data corresponding to an integrated luminosity of 137.2 fb−1 recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 TeV. The signal extraction method is based on a three-dimensional maximum likelihood fit of the dijet invariant mass and the mass of both jets. This approach has proven to increase the sensitivity and to be applicable to a diverse set of final states. As the search is focused on heavy resonances, the decay products of each boson are expected to be collimated into one single jet, substructure techniques are exploited to significantly reduce the SM background. Improvements in boson tagging techniques and sensitivity estimates will be presented.