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Full Production Analysis so far… Saminder Dhaliwal 24 th August 2005

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Resolution Z-> e+ e- Formula: (Reconstructed E – True E) / (0.1)*(sqrt [True E])

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Resolution at different Energy’s 40GeV < E < 50GeV 70GeV < E < 150GeV 50GeV < E < 70GeV 150GeV < E

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RMS and Sigma Full range of E 40GeV < E < 70GeV 50GeV < E < 70GeV 70GeV < E < 150GeV E > 150GeV Entries353761684177630561612 RMS4.3492.1952.9015.6165.403 sigma1.3421.1181.2161.831.565

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Producution so far Filtering events, asking for Lead Jet Pt > 30GeV, Second Jet Pt > 15GeV and eta gap between jets > 3.0 Generate about 10 000 events (with filters) daily Using about 40GB/day Expect about 52 electrons of which 4-5 have Pt > 20GeV to be generated daily.

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No Cuts Reconstruced: 1 317 437 Matched Truth: 855 811

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First Cut: Pt > 20GeV, and “hasTrack” Reconstruced: 87 971 Matched Truth: 74 680

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Second Cut: is egamma object Reconstruced: 13 890 Matched Truth: 11 595

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Third Cut: isEM with TRT Reconstruced: 179 Matched Truth: 154

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Fake rate Cut 1 Pt > 20GeV and hasTrack Cut 2 egamma Cut 3 isEM % of Candidates 6.671.050.014 % of Fakes 84.9 (15.1% fakes) 83.5 (16.5 % fakes) 86.0 (14.0% fakes)

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Conclusions Need to explore etcone and EoverP cuts further. Compare isEM analysis with and without TRT

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