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JLIP performance in p14

JLIP performance in p14. Daniel Bloch Denis Gelé, Sébastien Greder, Isabelle Ripp-Baudot (IReS Strasbourg). data samples selections Vº rejection ptrel fits and negative tags performance in p14. Data samples.

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JLIP performance in p14

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  1. JLIP performance in p14 Daniel Bloch Denis Gelé, Sébastien Greder, Isabelle Ripp-Baudot (IReS Strasbourg) • data samples • selections • Vº rejection • ptrel fits and negative tags • performance in p14 D. Bloch (IReS Strasbourg)

  2. Data samples • muon-in-jet: 134k events p14.03 for b-tag efficiency (from Philipp Schierferdecker: /rooms/leg/boston/meena/DATA/bid/mujet ) jets with a medium muon of pt>4 GeV and R<0.5 (but the same p13.06 sample is not used here due to a mismatch between p13 and p14 unpackings…) • jet trigger data: 97k from p14.03 on krutenau-clued0:disk2/work/ripp/data/p14/triggerjet/, for negative tag rates and light ptrel template • “p14.01” MC (in fact reco with p13.08…): 204k Zcc and 158k Zbb for c, b ptrel templates 213k QCD with pt>40, 80 for negative tag corrections D. Bloch (IReS Strasbourg)

  3. Selections • Primary vertex: use highest multiplicity Pvreco in p14, ask 3 tracks and |zPV|<60 cm • Tracks: ask R<0.5, pt>0.5 GeV, |dca|<0.15cm in r and <0.4cm in z, to belong among the following 5 categories: . <7 CFT hits, 3 SMT superlayers with inner layer, ||>1.6or 7 CFT hits and 1,2,3 or 4 SMT superlayers • Taggability: use jets if there are 2 selected tracks among these 5 categories, apply jetid v3.2, jetcorr v4.2 • Tagging: use taggable jets . . use only tracks with pt>1 GeV (but could be less) . reject tracks from conversions, Kº,  D. Bloch (IReS Strasbourg)

  4. taggability MC qcd “p14.01” jet trigger data p14.03jet trigger data p13.05 But I cannot tell if the taggability is better in p14 than in p13 data because there is an efficiency drop in  in the p13 sample used… D. Bloch (IReS Strasbourg)

  5. Vº selection D. Bloch (IReS Strasbourg)

  6. Vº in p14 jet trigger data Mee < 0.025 dLxy > 1.5cm - compute mass at SVX - ask  1 track to be good for tagging (pt>1, |dca|<0.15, |zdca|<0.4, 1smt) - show track pairs in taggable jets and track pairs in tagged jets (JLIP Prob<1%, before Vº rejection) M() in 0.475 - 0.515 M(p) in 1.105-1.125 D. Bloch (IReS Strasbourg)

  7. compare new/old Vº cuts new cuts old cuts 2-3 times more Kº 4 times more  and much more conversions with the new cuts D. Bloch (IReS Strasbourg)

  8. Vº rate in p14 jet trigger data total Vº Kº  conversion 1.6% Vº per taggable jet but 10% Vº per jet before positive tag (Prob<1%) which can be rejected D. Bloch (IReS Strasbourg)

  9. IP resolution functions • Compute resolution functions from tracks with negative impact parameter significance in jet trigger data. Infer a probability from these PDF’s • In p13: use 11 sub-categories of tracks: depending on SMT, CFT hits and pscat=pt sin , |significance|<30 • In p14: use the same (“old”) PDF categories, but also new ones with 29 sub-categories depending on SMT, CFT hits, ²,  and pt of tracks , |significance|<40 D. Bloch (IReS Strasbourg)

  10. ptrel templates on krutenau-clued0 /home/bloch/ptrel light c b 15<pt(jet)<35 light: tracks in jet trig data c and b: from Z MC . 35<pt(jet)<55 3 * 9 templates: 15< pt(jet)<35 35<pt(jet)<55 pt(jet)>55 4<pt(mu)<66<pt(mu)<10pt(mu)>10 pt(jet)>55 D. Bloch (IReS Strasbourg)

  11. ptrel fits Fit and compute b-tag efficiencies in 3 pt(mu) bins, Then compute a weighted average total light c b Compute b-tag efficiencies in 3 pt(jet) bins ||<1.2 (CC), ||>1.5 (FC) Prob<0.005, 0.01, 0.02 Distinguish p14 data with the old and new PDF’s D. Bloch (IReS Strasbourg)

  12. light-tag efficiencies • Use negative tags . • - Correct from MC . • - Compute the . light-tag efficiency in the same bins pt(jet), (jet), Prob D. Bloch (IReS Strasbourg)

  13. JLIP performance in p14 real data new PDF new Vº new PDF old Vº old PDF old Vº Vº rejection is a tiny effect Improvement with the new PDF D. Bloch (IReS Strasbourg)

  14. Summary • improvement in JLIP, by taking into account the ² and  of tracks • much better Vº rejection, but it is a tiny effect • In p14: 50-60% (30-40%) b-tag efficiency. in central (forward) region, for a 1% light quark efficiency • still to fix the taggability criteria D. Bloch (IReS Strasbourg)

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