StandardModelCSCResultsWZSignatures

Electroweak Boson Cross-Section Measurements

This page provides information and plots for W/Z signature studies from ATLAS CSC book, as published in

ATLAS Collaboration, Expected Performance of the ATLAS Experiment, Detector, Trigger and Physics, CERN-OPEN-2008-020, Geneva, 2008, to appear.

Captions refer to the plots figure just above. Please refer to the text for additional detail and description of the plots.

Identification efficiency for electrons vs. eta. The efficiencies are obtained from Z boson events, and integrated over pt>20 GeV.

Muon combined reconstruction efficiency vs. eta. The efficiencies are obtained from Z boson events, and integrated over pt>20 GeV.

Electron identification variable : cluster width in the first calorimeter sampling, for background and signal.

Electron identification variable : core energy fraction in the second calorimeter sampling, for background and signal.

Electron identification variable : cluster hadronic to EM energy ratio, for background and signal.

Electron identification variable : electron isolation variable, for background and signal.

Di-electron invariant mass distribution in the Z to ee channel, for signal and background, for 50 pb-1.

Transverse mass distribution in the W to enu channel, for signal and background, for 50 pb-1, after all selections except the transverse mass cut.

Comparison of the jet background (points with error bars) and the fitted background (rectangles), for an integrated luminosity of 50 pb-1.

Ratio of the MET distributions in jet background events and in the control sample.

Distributions of the muon isolation variables for signal and backgrounds after all selection cuts : track multiplicity within $\Delta R = 0.5$ around the muon.

Distributions of the muon isolation variables for signal and backgrounds after all selection cuts : total transverse momentum of tracks tracks within $\Delta R = 0.5$ around the muon.

Di-muon invariant mass distribution in the Z to mu mu channel, for signal and backgrounds, for 50 pb-1.

Transverse mass distribution in the W to munu channel, for signal and background, for 50 pb-1, after all selections except transverse mass cut.

Mass distributions of selected events in the low mass Drell-Yan analysis.

Differential cross-section, dSigma/dMee, before and after efficiency and acceptance corrections.

Differential cross-section dSigma/dPt in the Zee channel, for an integrated luminosity of 200 pb-1. The D0 method was used.

Differential cross-section dSigma/dy in the Zee channel, for an integrated luminosity of 200 pb-1. The D0 method was used.

Differential cross-section dSigma/dPt in the Zmumu channel, for an integrated luminosity of 200 pb-1. The D0 method was used.

Differential cross-section dSigma/dy in the Zmumu channel, for an integrated luminosity of 200 pb-1. The D0 method was used.

Differential cross-section dSigma/dPt in the Zmumu channel, for an integrated luminosity of 200 pb-1. The method determines cross-section and efficiency simultaneously.

Differential cross-section dSigma/dy in the Zmumu channel, for an integrated luminosity of 200 pb-1. The method determines cross-section and efficiency simultaneously.

Muon efficiency vs eta, determined together with the differential cross-section measurement.

Responsible: StefanTapprogge
Last reviewed by: Never reviewed