Level 2 histograms are available by running the trigger_examine process. This process runs as an examine from the data distributor. It produces a rootuple from the d0_analyze process, then a second process generates a series of histograms from the roottuple output.
The plots are organized into inputs to the Level 2 workers, and those that passed the Level 2 global processor (outputs). Every event in the output plots have passed a Level 2 trigger, but there is no information in the Examine as to which trigger was passed. The input plots have events that have passed a Level 1 trigger, but the events might have passed any Level 1 trigger, or multiple triggers.
The following pages of plots are available from the trigger gmbrowser:
Please check that histograms match the red reference histograms.GM Page Histogram Description --------------- ---------------- ---------------------------------------------- L2 output Jets number per event jets in all events that passed L2 Pt thresholds at 5 and 20 GeV (set by trigger list) eta ~symmetrical about 0, dips at ICR (1.1-1.2) phi ~flat eta vs. phi white boxes for masked hot cells, bands for ICR - no ref. plot, so compare to previous plots L2 output EM Objects 1 number per event electrons in all events that passed L2 Pt exponenential decay, thresholds at 5 and 10 GeV eta ~symmetrical about 0, dips at ICR (1.1-1.2) phi ~flat eta vs. phi white boxes for masked hot cells, bands for ICR - no ref. plot, so compare to previous plots L2 output EM Objects 2 isolation electron isolation EM fraction EM fraction cut above 0.8 L2 output Muons number per event muons in all events that passed L2 Pt thresholds at 2 and 5 GeV eta ~symmetrical about 0, dip at zero phi ~9 spikes (Phi information sometimes gets lumped to the center of a pad. Central and Forward don't line up exactly. So, ~9 spikes.) eta vs. phi darker phi bands for the phi spikes - no ref. plot, so compare to previous plots quality 1 for loose, 2 for medium, 3 for tight muons (no muons are double-counted) L2 input elec 1 number per event electrons in all events that passed Level 1 Et thresholds set by L1 trigger list eta ~symmetrical about 0, dips at ICR (1.1-1.2) phi ~flat L2 input elec 2 eta vs. phi white boxes for masked hot cells, bands for ICR - no ref. plot, so compare to previous plots EM fraction EM fraction, btw. 0 and 1 isolation electron isolation L2 input jets number per event jets in all events that passed L1 Et thresholds set by L1 trigger list eta ~symmetrical about 0, dips at ICR (1.1-1.2) phi ~flat eta vs. phi white boxes for masked hot cells, bands for ICR - no ref. plot, so compare to previous plots L2 input central muons number per event central muons in all events that passed L1 pt the pt measurement of the central muons (spike at 0) (negative pt's for negatively charged muons) eta ~symmetrical about 0, dip at zero phi ~6 spikes (Phi information sometimes gets lumped to the center of a pad.) eta vs. phi darker phi bands for the phi spikes - no ref. plot, so compare to previous plots L2 input forward muons number per event forward muons in all events that passed L1 pt the pt measurement of the forward muons (spike at 0) (negative pt's for negatively charged muons) eta ~symmetrical about 0, dip at zero phi ~6 spikes (Phi information sometimes gets lumped to the center of a pad.) eta vs. phi darker phi bands for the phi spikes - no ref. plot, so compare to previous plots
There is another version of the Examine, which was designed for use by Level 2 experts, primarily for system debugging and commissioning. The Expert Examine shows slightly more details in its plots, and it has the ability to select plots that correspond to a particular trigger bit.