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PU Peak2 and Multiplicity Cuts

PU Peak2 and Multiplicity Cuts. PU peak2 cut: yield versus lumi Timing: L1VeloClusters cut Status of note on L1L0 eff vs mult. cuts. PU peak2 cut: Yield vs Lumi. Marko Zupan and MFL Two errors found on both sides (all fixed now): Both: L1 returns incomplete if L0=false

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PU Peak2 and Multiplicity Cuts

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  1. PU Peak2 and Multiplicity Cuts • PU peak2 cut: yield versus lumi • Timing: L1VeloClusters cut • Status of note on L1L0 eff vs mult. cuts

  2. PU peak2 cut: Yield vs Lumi • Marko Zupan and MFL • Two errors found on both sides (all fixed now): • Both: L1 returns incomplete if L0=false • MZ: dimuon was never triggering • MFL: forgot to recalculate ratio of ncoll>0 / ncoll=0 which depends on luminosity • Still waiting for full stats to get better numbers at high luminosity. Currently: • MZ: 200k MBIA, 2300 Bs->DsK • MFL: 500k MBIA, 2300 Bs->DsK

  3. Yield and Effs. vs Lumi • Marko Zupan: solid symbols with dashed curve • MFL: open symbols with solid curve • Triangles: no pk2 cut • Circles: pk2 cut = 3 • Still some discrepancy left in L1 eff. Due to low stats ? To be understood…

  4. Gain in L1 time and L1VeloClusters cut No cut No cut L0: No pk2 and multipl. cuts L0: nominal pk2 and multipl. cuts

  5. L1L0_multipl_cuts note • The note is on its way • Circulate draft before the week-end

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