Measurement of the $\mathrm{t\bar{t}}\mathrm{b\bar{b}}$ production cross section in the all-jet final state in pp collisions at $\sqrt{s} =$ 13 TeV
Phys.Lett. B803 (2020) 135285, 2020.
The CMS collaboration

Abstract (data abstract)
CERN-LHC. Measurement of the ttbb production cross section in the all-jet final state in proton-proton collisions at centre-of-mass energy of 13 TeV with 35.9 fb^-1 of data collected in 2016. The final state used is 8 jets. Three different phase space regions are used for the measurement The Parton independent (PI) phase space: - 8 or more jets - 4 or more bjets - leading 6 jets with ptJet > 30 GeV - ptJet > 20 GeV - |etaJet| < 2.4 The Parton based (PB) phase space: - 8 or more jets - 4 or more bjets - leading 6 jets with ptJet > 30 GeV - ptJet > 20 GeV - |etaJet| < 2.4 - 2 or more bjets not matched to a top decay object The total phase space: - 2 or more bjets not matched to a top decay object - not matched bjets ptJet > 20 GeV - not matched bjets |etaJet| < 2.4

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