ATLAS Event Display: High Jet Multiplicity Event (19 jets)

Visualisation of the highest jet multiplicity event selected in a control region used to make predictions of the background from multijet production. This event was recorded by ATLAS on 18 July 2018, and contains 19 jets, illustrated by cones. Yellow blocks represent the calorimeter energy measured in in noise-suppressed clusters. Of the reconstructed jets, 16 (10) have transverse momenta above 50 GeV (80 GeV). No jets were b-tagged. The leading jet has a transverse momentum of 371 GeV, and the sum of jet transverse momenta HT=2.2 TeV. A value of 8 GeV is observed for the ETmiss, whose direction is shown by the dashed red line, producing a significance 𝒮(ETmiss)=0.2. The sum of the masses of large-radius jets is evaluated as MJΣ=767 GeV.