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

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

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

RMS and Sigma Full range of E 40GeV < E < 70GeV 50GeV < E < 70GeV 70GeV < E < 150GeV E > 150GeV Entries RMS sigma

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

No Cuts Reconstruced: Matched Truth:

First Cut: Pt > 20GeV, and “hasTrack” Reconstruced: Matched Truth:

Second Cut: is egamma object Reconstruced: Matched Truth:

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

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

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