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