Difference: Brenoorzari (6 vs. 7)

Revision 72019-04-08 - brenoorzari

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I've got the right lepton veto using the reconstructed leptons instead of the generated leptons (I guess I was getting ALL of the generated leptons, instead of only the isolated ones). Less then 1% of the signal events were cut using this veto. My problem is still in the b-tagging and the MET cut. The number of events reduced by the MET cut was expected since I'm getting only the end of the tail events (I'll understand this sentence every time). The b-tagging is excluding almost 100% of the signal events, and that is disturbing. To solve it, I've generated some new signal events TREES from Delphes for the 3 dark Higgs masses (10000 events each), which contain the gen particle, the MET, the jet, gen jet, fat jet, gen fat jet, reco electrons and muons branches to do the b-tagging by hand and check what is happening. The folder is named DM_signal_withelecmuon_btagging_test, and the files are DM_signal_withelecmuon_btagging_test50, DM_signal_withelecmuon_btagging_test70, DM_signal_withelecmuon_btagging_test90. The macro genfatjet_macro.C was used in those files.
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I've got the right lepton veto using the reconstructed leptons instead of the generated leptons (I guess I was getting ALL of the generated leptons, instead of only the isolated ones). Less then 1% of the signal events were cut using this veto. My problem is still in the b-tagging and the MET cut. The number of events reduced by the MET cut is expected since I'm getting only the end of the tail events (I'll understand this sentence every time). The b-tagging is excluding almost 100% of the signal events, and that is disturbing.

To solve it, I've generated some new signal events TREES from Delphes for the 3 dark Higgs masses (10000 events each), which contain the gen particle, the MET, the jet, gen jet, fat jet, gen fat jet, reco electrons and muons branches to do the b-tagging by hand and check what is happening. The folder is named DM_signal_withelecmuon_btagging_test, and the files are DM_signal_withelecmuon_btagging_test50, DM_signal_withelecmuon_btagging_test70, DM_signal_withelecmuon_btagging_test90. The macro genfatjet_macro.C was used in those files.

Also, I've build a macro (btagging_namao.C) to check Delphes b-tagging and it's WRONG! In the .root files, there is no b-tagging in the jets, but when I do it by hand, I find a lot (more than zero in this case) of b-tagged jets. I'm testing the jet->Flavor object also, and it seems to be working fine. Don't know what is the problem with Delphes. The next step is to implement my b-tagging in the real files and get the number of events that pass all of the requirements.

There is another new folder, the more_events_DM_signal_withelecmuon_btagging_test since 10000 events aren't enough for what I need. Then I'll test the b-tagging again with the gen particles and the jet->Flavor option. The files inside the folder (and in the Delphes folder) are more_events_DM_signal_withelecmuon_btagging_test50, more_events_DM_signal_withelecmuon_btagging_test70, more_events_DM_signal_withelecmuon_btagging_test90 and I've used the macro btagging_namao.C to check the b-tagging. These files will be used for the signal number of events prediction.

  • The signal was simulated using 30000 events for each mass of the dark Higgs, with the following luminosities (fb^-1):
    • m_{hs} = 50 geV - 41,24;
    • m_{hs} = 70 geV - 50,64;
    • m_{hs} = 90 geV - 61,71.
  Tried to solve the NLO problem on MadGraph, but my knowledge doesn't allow me to do it. Must also talk to Thiago about it. I've even tried to use what CLASHEP taught me, but it didn't worked because there is something else missing.
 
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