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D0->hh exclusive lines updating selections

Nico Kleijne requested to merge nkleijne_D02hh_v2 into master

The basic idea behind these selections is to have a Hlt1 decision to use as a filter for the "Low Bias" Hlt2 lines of Moore!1062 (merged) .

The IP selection is preferred over the IPCHI2 one. IP is a more robust and easier quantity that can also be reproduced in offline studies. Moreover, IP introduces less correlations between the kinematics of the D^0 and its decay time: these correlations can be problematic when searching for time dependent CP violation.

Rates measured using HltEfficiencyChecker on 100k events of minimum bias with the testfiledb sample MiniBrunel_2018_MinBias_FTv4_DIGI

  • Rate of Hlt1D2PiPiDecision : 34.0 +- 3.2 KHz
  • Rate of Hlt1D2KPiDecision : 66.9 +- 4.5 KHz
  • Rate of Hlt1D2KKDecision : 52.1 +- 3.9 KHz
  • Exclusive rate of (Hlt1D2PiPiDecision || Hlt1D2KPiDecision || Hlt1D2KKDecision) && !Hlt1TrackMVADecision && !Hlt1TwoTrackMVADecision : 55.5 +- 4.1 KHz

TOS efficiencies measured using HltEfficiencyChecker on 10k events of D^*+ -> D0(->h^+h^-) pi^+ (where h^+h^- are chosen accordingly to the line)

  • TOS efficiency of Hlt1D2PiPiDecision : 2.9 +- 0.2 %
  • TOS efficiency of Hlt1D2KPiDecision : 2.5 +- 0.2 %
  • TOS efficiency of Hlt1D2KKDecision : 2.4 +- 0.2 %

FYI: @mimorell

Edited by Nico Kleijne

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