X &rarr ZZ with 3/fb

Public Page


Blessed November 20, 2008
Luminosity 2.5-2.9/fb
Contacts
Antonio Boveia (primary), Ben Brau, David Stuart
Public Documentation
pdf

Click any plot for a high resolution version.


Prediction and unblinded data for all four-lepton channels combined.

Prediction and unblinded data for both dijet channels combined.

Prediction and unblinded data for electron-triggered channels at each signal mass considered.

Prediction and unblinded data for muon-triggered channels at each signal mass considered.

Prediction and unblinded data for dijet channels at each signal mass considered.

Observed and expected limit using a spin-2 graviton acceptance. For a universal coupling, this search is not as sensitive as searches for RS gravitons in the diphoton and dijet channels, but as a widely-available standard process the model communicates our sensitivity to any massive resonance decaying to Z pairs.

Comparison of the dielectron mass spectrum using the CDF standard "loose" and our "loose" electron selections.

Comparison of the dimuon mass spectrum using the CDF standard "loose" CMUP and CMX muons and our "loose" selection.

Highest mass eejj event (868 GeV). A signal candidate (consistent with background expectation).

Smallest &chi2 muon-triggered &mu&mu ee candidate (176 GeV, &chi2=2). The ET = 20 GeV plug electron should have left hits in most of the COT, but no compatible hits are present. If not for that important flaw, this would be another excellent SM ZZ candidate event.

Second-lowest &chi2 four-electron candidate (this and our 1/fb search also found a candidate with &chi2 = 0.2).

This has a four-electron mass just above the ZZ kinematic threshold (192 GeV) and two dilepton pairs consistent with Z's (&chi2=0.94), making it an excellent SM ZZ candidate.

Last updated December 25, 2008 by Antonio Boveia.
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