Search for heavy resonances decaying to a top quark-antiquark pair in dilepton + jets final states

CMS Physics Analysis Summaries
Report number	CMS-PAS-B2G-23-010
Title	Search for heavy resonances decaying to a top quark-antiquark pair in dilepton + jets final states
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	A search for a heavy resonance decaying into a top quark and antiquark pair is performed using proton-proton collisions at $\sqrt{s}=13\,\text{TeV}$. The search uses the dataset collected with the CMS detector during Run 2, corresponding to total integrated luminosity of 138$~\mathrm{fb^{-1}}$. The analysis considers final states where both top quarks decay leptonically. Events are selected by requiring two charged leptons, missing transverse momentum and jet activity. Jets containing b-hadrons are required in order to reduce the background from standard model processes. The analysis is optimized for events where the top quarks are Lorentz-boosted resulting in collimated decay products. To achieve improved sensitivity for the signal detection, kinematic variables carrying information about large momentum transfer are examined for local excesses above the background expectation. No significant deviations from the standard model predictions are found. Exclusion limits are set on the production cross section times branching ratio for hypothetical $Z'$ boson, Kaluza-Klein gluon, and dark matter mediator particle $Z'_{\mathrm{DM}}$ that decay into top quark pairs.
Other source	Inspire
Email contact: cms-pag-conveners-b2g@cern.ch Fulltext in PDF Figure_003-a Figure_003-c Figure_003-b Figure_004-a Figure_005-e Figure_004-b Figure_002-a Figure_002-b Figure_002-c Figure_005-c Figure_005-b Figure_005-a Figure_005-d Figure_001-c Figure_001-b Figure_001-a Figure_004-c Additional information for the analysis (restricted access)