1. EWK Drell-Yan: Status and Plans
Dimitri Bourilkov
University of Florida
General EWK Meeting, CERN, July 21, 2008

2. Drell-Yan Meetings 3 & 4
D.Bourilkov
EWK Drell-Yan: Status

3. Top-pair background in e+e- - eμ study
Vincent Dero, Pascal Vanlaer
top-pair background very important
Can be estimated with eμ events
D.Bourilkov
EWK Drell-Yan: Status

4. Top-pair background in µ+µ- - b tags
Jonatan Piedra (TevMu)
top-pair background sizable
Estimation using b-tags
D.Bourilkov
EWK Drell-Yan: Status

5. Efficiency – Tag & Probe
Chang Liu (Purdue)
Reconstruction & Trigger efficiencies
T & P at Z peak in good shape
To do – off peak DY
D.Bourilkov
EWK Drell-Yan: Status

6. Dilution Corrected AFB
Ping Tan, Dan Green
Sample size is about pb-1 data.
Do event-by-event correction of the dilution, select events with |y|>0.75.
D.Bourilkov
EWK Drell-Yan: Status

7. Mass Resolutions & Corrections for Smearing
Ping Tan, Dan Green
Obtained the mass resolution from MC at this moment, including both momentum resolution & FSR effect.
Core Gaussian width is m0
D.Bourilkov
EWK Drell-Yan: Status

8. Z+Jets – PAT Analysis
Analysis of Z+Jets (Chowder) using Physics Analysis Toolkit (PAT): Monika Jindal, Kajari Mazumdar, Jasbir Singh
Invariant Mass Distribution of Dimuons
Selection criteria applied :
 Tracker isolation has been used with
Sumpt <3.0 Gev in deltaR = 0.3
No. of muons must be >=2
 Muons must be oppositely charged with
cosDf between two muons <=-0.5
Comparison of Invariant Mass for Z/tt/W + Jets process
In case of Z+jets , there is cut of m_ll <40 and m_ll >200 at the Generation level
(Events have been normalized to 1.0
to compare the shape)
D.Bourilkov
EWK Drell-Yan: Status

9. What Next
TWIKI page:
Hypernews:
Studies with CMSSW_2_0_X well underway
Studies with CMSSW_2_1
PAT analyses
Explore 10 TeV
Run on real data including tracker from CRUZET3 and CRAFT
D.Bourilkov
EWK Drell-Yan: Status