Measurement of the top quark mass in the all-jets final state at $\sqrt{s}=$ 13 TeV and combination with the lepton+jets channel

  • Shimaa Abu Zeid (Creator)
  • Freya Blekman (Creator)
  • Jorgen D'Hondt (Creator)
  • Jarne Theo De Clercq (Creator)
  • Kevin Deroover (Creator)
  • Giannis Flouris (Creator)
  • Denys Lontkovskyi (Creator)
  • Steven Lowette (Creator)
  • Ivan Marchesini (Creator)
  • Seth Moortgat (Creator)
  • Lieselotte Moreels (Creator)
  • Quentin Python (Creator)
  • Kirill Skovpen (Creator)
  • Stefaan Tavernier (Creator)
  • Walter Van Doninck (Creator)
  • Petra Van Mulders (Creator)
  • Isis Marina Van Parijs (Creator)

Dataset

Abstract

A top quark mass measurement is performed
using 35.9 fb−1 of LHC proton–proton collision data collected with the CMS detector at √s = 13 TeV. The measurement uses the tt all-jets final state. A kinematic fit is performed to reconstruct the decay of the tt system and suppress
the multijet background. Using the ideogram method, the top
quark mass (mt) is determined, simultaneously constraining an additional jet energy scale factor (JSF). The resulting
value of mt = 172.34 ± 0.20 (stat+JSF) ± 0.70 (syst) GeV
is in good agreement with previous measurements. In addition, a combined measurement that uses the tt lepton+jets
and all-jets final states is presented, using the same mass
extraction method, and provides an mt measurement of
172.26 ± 0.07 (stat+JSF) ± 0.61 (syst) GeV. This is the first
combined mt extraction from the lepton+jets and all-jets
channels through a single likelihood function.
Datum van beschikbaarheid1 mei 2019
UitgeverHEPData

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