Search for pair-produced vector-like top quarks decaying to Lorentz-boosted top quarks and scalars in proton-proton collisions at $\sqrt{s}=$ 13 TeV

CMS Physics Analysis Summaries
Report number	CMS-PAS-B2G-24-016
Title	Search for pair-produced vector-like top quarks decaying to Lorentz-boosted top quarks and scalars in proton-proton collisions at $\sqrt{s}=$ 13 TeV
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The first search for pair-produced vector-like top quarks, $\mathrm{T}$, decaying to a new scalar boson $\phi$ and a standard model (SM) top quark is presented. The search targets events containing a photon pair originating from the decay of one of the scalar bosons, accompanied by all-hadronic decays of the SM top quark pair. The analysis is optimized for boosted top quark signatures in which the decay products of the top quarks are reconstructed as large-radius jets. The search is based on proton-proton collision data at a center-of-mass energy of $\sqrt{s}=13~\mathrm{TeV}$, collected by the CMS experiment at the CERN LHC during 2016, 2017, and 2018, corresponding to an integrated luminosity of $138~\mathrm{fb}^{-1}$. The search is performed in the two-dimensional $(m_{\mathrm{T}}, m_{\phi})$ plane. No significant deviation from the standard model prediction is observed. Assuming a branching fraction of 100$\%$ for $\phi \to \gamma\gamma$, upper limits at 95$\%$ confidence level are set on the $\mathrm{T}\bar{\mathrm{T}}$ production cross section. Vector-like top quark masses below $1.39~\mathrm{TeV}$ are excluded.
Email contact: cms-pag-conveners-b2g@cern.ch Fulltext in PDF Figure_008-b Figure_008-c Figure_008-a Figure_008-d Figure_008-e Figure_007-b Figure_006-e Figure_003-a Figure_006-f Figure_003-c Figure_003-b Figure_003-e Figure_003-d Figure_003-f Figure_004-f Figure_004-d Figure_004-e Figure_004-b Figure_004-c Figure_004-a Figure_005-c Figure_005-b Figure_005-a Figure_007-a Figure_005-f Figure_005-e Figure_005-d Figure_002-d Figure_006-a Figure_006-b Figure_006-c Figure_006-d Figure_002-a Figure_002-b Figure_002-c Figure_001 Additional information for the analysis (restricted access)