Nick Edwards 1
Binned CZZ and systematics for ZZ->4l
Nick Edwards
Nick Edwards 2
Predicted Yield, CZZ
From note
• About 9% more predicted events compared to Moriond.
Nick Edwards 3
Binned Yield / CZZ
pT(Z1)Electron Systematics
pT(Z1)Muon Systematics pT(Z1)
C_ZZ
mZZElectron Systematics
mZZMuon Systematics mZZ
C_ZZ
-> Bin by bin k-factor applied
Nick Edwards 4
Systematics Breakdown• Generally compatible with note.• Electron momentum smearing uncertainty now an order of magnitude
smaller, and decreases yields in both directions.• IP resolution seems slightly larger in the electron channel now.
New Systematics, ZZ selection only From Note
Nick Edwards 5
Binned Systematics breakdown - Electrons• Electron smearing behaves very oddly.• Electron energy scale increases significantly in higher bins.
Compensated by drop in ID efficiency uncertainty
4e
Nick Edwards 6
Binned Systematics breakdown - Muons• Again, smearing behaves quite oddly.
Nick Edwards 7
Binned Systematics breakdown• Electron smearing behaves very oddly.• Electron energy scale increases significantly in higher bins.
Compensated by drop in ID efficiency uncertainty