Jet Reconstruction Efficiencies

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Jet Reconstruction Efficiencies
James Heinmiller 21JUN04
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Straight Efficiencies qcd from Z to e e-
sample Parton to Jet Delta R lt 0.75 Jet Quality
Cuts - d0correct 0.05ltemflt0.95 chflt0.40 HotCellRat
io lt 10 f90 lt 0.5 f90chf lt 0.15 n90 gt 1 CC
L1confirm gt 0.40 ICD L1confirmgt0.20 EC
L1confirmgt0.40 EM-Jets Removed with Athena
Standard Cuts Em pt gt 20.0 Em emf gt 0.90 Em iso lt
0.15 hmatrix7 lt12.0 Delta R lt 0.45
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Z pt Jet Reconstruction Efficiencies Jet quality
cuts same as straight efficiency Only EM-Jets
removed were the electrons decaying from the
Z Level 2 veto After removing the two level 2
jets from the Z's decaying electrons, if there is
more than one jet above 8 GeV then the event is
skipped
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More on the Z pt technique Em pt gt 20.0 GeV -1.1
lt eta Em lt 1.1 Emf gt 0.90 Isolt0.15 hmatrix7 lt
12.0 at least one of the two Ems has a track
match 81.0 lt Z mass lt 101.0 Data Remove bad
luminosity blocks Remove ring of Fire Non t42
corrected jets Good Run list Ensure single EM or
Diem Triggers fired
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Z pt GeV
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Z pt GeV
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Scale Factor