TWiki> Main Web>TWikiUsers>HuguesBrun>TestForTrigger (revision 2)EditAttachPDF

Muon HLT Efficiency Measurement with the "Reference-Trigger" Method

Developers and contact information

D. Kovalskyi, H. Brun, C. Bernardes (for info: hugues.louis.brun@cernNOSPAMPLEASE.ch, cesar.augusto.bernardes@cernNOSPAMPLEASE.ch)

Goal

Very useful to measure the efficiency of complex trigger paths, such as double-muon and dimuon triggers, combination of triggers, cross-triggers, etc. The description and examples below refer to the specific cases of (combinations of) double-muon trigger paths HLT_Mu17_Mu8, HLT_Mu17_TkMu8, HLT_Mu22_TkMu8.

Ingredients

Choice of the reference trigger

The measurement is based on the computation of the complex trigger paths efficiency for event passing a reference trigger. The reference trigger should be chosen to have a high efficiency on the events passing the complex trigger to not bias the result. For example, HLT_Mu17 is the best candidate for double muon triggers like HLT_Mu17_Mu8, HLT_Mu17_TkMu8, HLT_Mu22_TkMu8.

Reference trigger efficiency

The reference trigger efficiency can be measured using the standard Tag and Probe method as documented here. As the HLT_Mu17 is prescaled, it is needed to request the tag muon be match with HLT_Mu17 to not have the prescale in the efficiency results.

Recipe

Edit | Attach | Watch | Print version | History: r6 | r4 < r3 < r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r2 - 2013-08-22 - HuguesBrun
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    Main All webs login

This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback