Masterclass: Z0 event identification quiz

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Event number=8649
\(E_\mathrm{CM}\) Centre-of-mass energy (sum of electron and positron beam energies)
=91.22 GeV
\(N_\mathrm{trk}\) Number of charged tracks
=2
\(P_\mathrm{trk}\) Sum of momenta of all charged tracks
=83.41 GeV/c
\({E}_\mathrm{EM}\) Total energy detected in EM calorimeter
=86.14 GeV
\({E}_\mathrm{had}\) Total energy detected in hadronic calorimeter
=0.2 GeV
\({E}_\mathrm{tot}\) Total sum of detected energy
(energy flow)
=90.53 GeV
\(\frac{ ({E}_{\mathrm{EM}} + {E}_{\mathrm{had}} + {P}_{\mathrm{trk}}) }{ {E}_{\mathrm{CM}} }\) =1.86

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