CMS-PAS-B2G-22-001

CMS-PAS-B2G-22-001
A search for a heavy resonance decaying to a top quark and a new scalar in the boosted all-hadronic final state at $ \sqrt{s}= $ 13 TeV
CMS Collaboration
2025-07-28

Abstract: A search for a heavy resonance decaying to a top quark and a neutral scalar boson $ \phi $ in the all-hadronic final state is presented, where the $ \phi $ boson candidate is identified by its decay into a bottom quark-antiquark pair. The search is focused on final states in which the decay products of the highly Lorentz-boosted top quark and $ \phi $ boson are each expected to be reconstructed as single, large-radius jets with distinct substructures. The analysis is performed using data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb$ ^{-1} $ recorded by the CMS experiment at the CERN LHC in 2016--2018. The production of a vector-like top quark, $ \mathrm{T}^\prime $, a weak-isospin singlet, is used as a benchmark model and limits are set at the 95% confidence level on the cross section for a heavy resonance decaying to a top quark and $ \phi $ boson. For the case where the neutral scalar is a standard model Higgs boson and the $ \mathrm{T}^\prime $ quark width is 5% of its mass, $ \mathrm{T}^\prime $ quark masses below 1.2 TeV are excluded.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PLB. The superseded preliminary plots can be found here.

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