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L2 trigger: chi2 tuning (includes changes/comments discussed in the meeting) Carmen Diez Pardos Silvia Goy López CIEMAT Madrid 11/01/2012 1C. Diez Pardos.

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Presentation on theme: "L2 trigger: chi2 tuning (includes changes/comments discussed in the meeting) Carmen Diez Pardos Silvia Goy López CIEMAT Madrid 11/01/2012 1C. Diez Pardos."— Presentation transcript:

1 L2 trigger: chi2 tuning (includes changes/comments discussed in the meeting) Carmen Diez Pardos Silvia Goy López CIEMAT Madrid 11/01/2012 1C. Diez Pardos

2 Check effect of changing chi2  ValidHits distributions: # of L2 with none validhits  Effect on resolution (compared to offline pT)  Data: 2011RunB Zskim (~55K events) (/SingleMu/Run2011B-ZMu-PromptSkim-v1)  SELECTION: events with a good offline Muon: Tracker&Global, chi2 10, ValidMuonHits>0, MatchedStations>1, pixelHits>0, abs(eta)<2.1 1. Resolution: hltL2MuonCandidate matched to the closest (smallest DeltaR) offline muon 2C. Diez Pardos

3 ValidHits with different chi2 3C. Diez Pardos chi2 #0Valid Hit /Total #0ValidHit /Total 400 0.00530.0016 350 0.00550.0014 3000.00590.0011 2500.00650.0010 1000.01340.0019 250.03540.00952 L2MuonCandidates matched to the CLOSEST offline muon For chi2>300 rather small difference

4 1/pT resolution 4C. Diez Pardos distributions: ValidHits>0

5 1/pT resolution 5C. Diez Pardos No cut in ValidHits

6 1/pT resolution chi2 RMS (ValidHits>0) SIGMA RMS (All L2) SIGMA (All L2) 400 0.2434 0.25040.1522 0.14490.24170.1527 3500.2431 0.24980.1520 0.14480.24140.1526 3000.2424 0.24890.1518 0.14470.24070.1524 250 0.2422 0.24570.1512 0.1445 0.24390.1519 1000.2376 0.24140.1491 0.14380.24040.1503 250.2321 0.23640.1441 0.14170.23910.1471

7 pT resolution 7C. Diez Pardos PT distributions: ValidHits>0

8 pT resolution 8C. Diez Pardos No cut in ValidHits

9 pT resolution chi2 RMS (ValidHits>0) SIGMA RMS (All L2) SIGMA (All L2) 400 0.2565 0.2509 0.1611 0.15560.26160.1616 350 0.2555 0.24960.1609 0.1554 0.26080.1614 3000.2540 0.24850.1606 0.15510.25950.1612 250 0.2560 0.24680.1599 0.1547 0.25590.1605 1000.2485 0.23790.1562 0.15250.25130.1572 250.2352 0.22810.1500 0.14960.24500.1530

10 Efficiency (HLT_Mu24, HLT_Mu40) 10C. Diez Pardos Efficiency for positive charged muon 0.2% higher than for negative muons Tag+Probe pairs Mmumu (60,120) GeV + criteria Slide1 pt> 30 GeV (40 GeV for HLT_Mu40) chi2 HLT_Mu24 (%) (stat error ~ 0.002) (no cut in ValidHits) HLT_Mu40 (stat error ~ 0.003) HLT_Mu24 (%) (stat error ~ 0.002) (no cut in ValidHits) HLT_Mu40 (stat error ~ 0.003) 400 91.88991.27191.91791.427 35091.904 (92.230) 91.223 (91.530) 92.042 (92.230) 91.492 (91.530) 30091.90291.20092.06791.556 25091.892 (92.253) 91.196 (91.530) 92.119 (92.253) 91.541 (91.530) 10091.67991.90292.582 91.874 2591.500 (92.546) 90.686 (91.733) 92.715 (92.546) 92.037 (91.733)

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