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Problems in the QEE Hlt2 Monitoring histograms

FYI @lugrazet

cc @abertoli @mvesteri @poluekt

I've recently taken a look at all the monitoring histograms in /eos/lhcb/wg/rta/WP3/HLT2_Monitoring/HLT2-run268205-268264.root.

I've drawn them and put them all in 1 .pdf here: qee_monitoring_plots.pdf.

The issues I found (not necessarily all the issues that are there):

  • ALPsToGammaGamma: strangely bumpy mass distribution given the statistics FYI @odurmus @tmombach,
  • Di{Light,TopoTag,SVTag}{10,15,20,25,30,35}GeV: mass, ipchi2 and vchi2 histograms are mostly unfilled/entries are in overflow/underflow etc. FYI @dzuliani @ncooke @ngrieser
  • Some funky shapes and lack of quarkonia mass peaks in the DiMuonNoIP lines. Will elaborate on that in the discussion. FYI @kaaricha,
  • {Jpsi,Upsilon}ToMuMu: no discernible mass peaks. A couple of strange eta distributions. FYI @lugrazet
  • WZRare: vchi2, ipchi2 and mass sometimes don't make sense. A couple of the lines have combinatorics issues. Will elaborate on that in the discussion. FYI @hyin.
  • All lines in high_mass_{dimuon,dielec} e.g. ZToMuMu, ZToEE, DiMuonSameSign etc: mass histograms incorrectly filled/don't make sense e.g. events all in under/overflow; axes limits wrong way around etc. FYI @jideng @hyin
  • No histograms present for any of the SingleHighPt{Muon,Electron} lines. FYI me, @lugrazet
  • No histograms present for the DiElectron lines under dielectron_persist_photons. FYI @johndan

For those interested, the monitoring is defined in Moore/Hlt/Moore/python/Moore/monitoring.py. The answers to some of these issues may be found in the configuration/assumptions made there.

Very relevant talk from Marian Stahl: https://indico.cern.ch/event/1234789/#7-hlt-line-monitoring

Outstanding Concerns

The problem related to N_CANDIDATES being incorrectly filled, mentioned several times in this issue, is being addressed in !2798 (merged).

The electron-related issues are still present in the default monitoring. see: #653 (comment 7319635)

The high_mass_di{muon, elec} is still not returning histograms. see: #653 (comment 7077762)

UPDATE AS OF 30-Apr-24: These three issues have all been handled... think once !3352 (merged) goes in it can be closed

Edited by Luke Grazette