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first try to add ZMuMu lines for run-3

Hang Yin requested to merge ccnu_zmumu into qee_upgrade

We add two lines for Z-> mumu study at Run-3, as Z-> mumu signal line and same-sign line. In these lines, simple event selections are used, as:

  1. muon pt > 3 GeV

  2. mass window cuts: M(mumu) > 40 GeV for Z->mumu signal line, and M(mumu) > 16 GeV for same-sign line

The trigger rate is test with the standard Run-3 rate setting, using 50k minimum bias events.

Line:    Hlt2LowPtSingleJetLineDecision          Incl: 0.734165387439 +/- 0.22 kHz, Excl: 0.734165387439 +/- 0.22 kHz

Line:    Hlt2MuMuSSLineDecision                  Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz

Line:    Hlt2SingleHighPtMuonLineDecision        Incl: 0.867650003337 +/- 0.24 kHz, Excl: 0.867650003337 +/- 0.24 kHz

Line:    Hlt2ZToMuMuLineDecision                 Incl: 0.0  +/- 0.0  kHz, Excl: 0.0  +/- 0.0  kHz

To make sure 0 Hz is expected, we also made another test with loosed selection cuts, as

  1. muon pt > 0

  2. mass window cuts: M(mumu) > 40 MeV, and 16 MeV for signal and SS lines

trigger rates (10k evts) for this setting are shown below:

Line:    Hlt2LowPtSingleJetLineDecision          Incl:   0.8 +/- 0.28 kHz, Excl:   0.4 +/- 0.19 kHz

Line:    Hlt2MuMuSSLineDecision                  Incl: 741.8 +/- 4.37 kHz, Excl: 157.6 +/- 3.64 kHz

Line:    Hlt2SingleHighPtMuonLineDecision        Incl:   1.0 +/- 0.31 kHz, Excl:   0.0 +/- 0.0  kHz

Line:    Hlt2ZToMuMuLineDecision                 Incl: 637.9 +/- 4.80 kHz, Excl:  53.7 +/- 2.25 kHz

We were planning to make efficiency plots for Z-> mumu, but when we check Run-3 MC samples, and found there is no request for Z-> mumu from QEE group. So may be we should start to request Z-> mumu sample now.

Edited by Hang Yin

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