SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 106: Searches IV
T 106.5: Vortrag
Donnerstag, 23. März 2023, 16:50–17:05, HSZ/0403
Search for Beyond Standard Model particles with exclu- sive coupling to top quarks in four-top-quark final states — •Gabriele Milella1, Freya Blekman1, Matthias Komm1, and Denise Müller2 — 1DESY, Hamburg, Germany — 2VUB, Brussel, Belgium
Many Beyond Standard Model (BSM) theories predict new top-philic particles that couple exclusively with the top quark, as this coupling is the most favorable for new physics with respect to any other lighter quark.
This search is therefore focused on a heavy resonance decaying to a pair of top quarks. The resonance is produced in association with a top quark pair resulting in four top quarks in the final state.
The two top quarks from the resonance are expected to be highly boosted and their decay products can be found within large-radius jets. The signal region is constructed from events that contain also opposite-sign leptons and b-tagged jets.
The invariant mass distribution of the reconstructed pair of large-radius jets is studied. Various signal scenarios with different resonance masses and decay widths are tested by searching for local excesses in the reconstructed mass spectrum of the large-radius jets. Preliminary results are presented using the LHC Run 2 data taken with the CMS experiment.