Plot the histograms

Prerequisites and goal

You need the background histogram file from Make simple histograms. Repeat that configuration with process = "tta_mAlp-12GeV_ctau-1e2mm" to produce the matching signal file.

The goal is to overlay the signal on the background and write PDF plots.

Prepare the plotting config

cp tea/configs/das_exercises/task2_plotting.py configs/plot_histograms.py

Point the two Sample entries at:

file_path="../results/tutorial/histograms/background_ttsemileptonic.root"

and:

file_path="../results/tutorial/histograms/tta_mAlp-12GeV_ctau-1e2mm.root"

Set:

output_path = "../results/tutorial/plots/simple/"

Keep histogram names consistent with the previous exercise:

histograms = (
  Histogram("Muon_pt", "", False, True, NormalizationType.to_lumi,
            1, 0, 200, 1, 1e4, "Muon p_{T} [GeV]", "Events"),
  Histogram("Muon_eta", "", False, False, NormalizationType.to_lumi,
            1, -2.4, 2.4, 0, 250, "Muon #eta", "Events"),
)

Run

source tea/build.sh
cd bin
python3 plotter.py --config plot_histograms.py

Expected output

results/tutorial/plots/simple/ should contain plots for Muon_pt and Muon_eta. Confirm that both sample labels appear and that the axes match the configuration. A successful Python exit alone does not verify the rendered plot.

Next step

Select and skim events.