Relevant figures for HzzRandomConeStudy

Random cone distributions

Tracker Isolation

• investigate where the little event between [0,1] comes from. Could be due to the fact that sum of pT is made with all tracks and then pT from gsfElectrons (or allMuons) in the cone is subtracted.
• possible improvement is subtraction of the ctfTrack of electron (muon) found in the cone

CaloTower Isolation

• add number of CaloTowers that are above threshold for an average event.

ECal Isolation

• Why the iso-eta distribution looks like this? Are these just noise, or... Check number of crystals in deltaR cone!
• Plot distribution of Ecal deposit in all the detector to get more knowledge of the underlying event... It should be the same as these, well similar eta behaviour.

HCal Isolation

• How to explain peak at 1 GeV for D1 isolation?
  • Looking at the HCalD1Iso03VsEta plot, maybe. The peak is the effect of two populations: EE and EB
• Why is the HZZ4l had isolation much broader then the EGamma one?
  • Because EGamma has veto cone in hadronic isolation algorithm and HZZ4l doesn't.

• Why does HZZ4l had iso have so much activity in the central barrel region?
  • The difference comes from the fact that EGamma has an inner cone of 0.15 to be orthogonal with H/E cut (kind of isolation criteria). HZZ4l doesn't use veto cone in HCal. In MinBias data there are mainly isolated pions which deposit energy in HCal and thus enter to the computation of isolation variable

Efficieny plots

-- RokoPlestina - 18-Mar-2010