A search for supersymmetry is presented based on proton-proton collision events containing identified hadronically decaying top quarks, no leptons, and an imbalance $p_{\mathrm{T}}^{\mathrm{miss}}$ in transverse momentum. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of $35.9{\mathrm{fb}}^{-1}$. Search regions are defined in terms of the multiplicity of bottom quark jet and top quark candidates, the $p_{\mathrm{T}}^{\mathrm{miss}}$, the scalar sum of jet transverse momenta, and the $m_{\mathrm{T}2}$ mass variable. No statistically significant excess of events is observed relative to the expectation from the standard model. Lower limits on the masses of supersymmetric particles are determined at 95% confidence level in the context of simplified models with top quark production. For a model with direct top squark pair production followed by the decay of each top squark to a top quark and a neutralino, top squark masses up to 1020 GeV and neutralino masses up to 430 GeV are excluded. For a model with pair production of gluinos followed by the decay of each gluino to a top quark-antiquark pair and a neutralino, gluino masses up to 2040 GeV and neutralino masses up to 1150 GeV are excluded. These limits extend previous results.

• Received 30 October 2017

DOI:https://doi.org/10.1103/PhysRevD.97.012007

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© 2018 CERN, for the CMS Collaboration