Results are available for final states relevant for the W/Z + Higgs associated production:

• W(->enu) + jets
• W(->munu) + jets
• Z(->ee) + jets
• Z(mumu) + jets

in which the emphasis is properties of jets in W/Z + di-jet events (for W/Z properties, e.g. inclusive cross sections, see W/Z physics group web site)

and for searches for non Standard Model Higgs:

• H -> WW^(*) -> ee/emu/mumu
• H -> gamma+gamma

Additional information for DZero collaborators can found on the Higgs group documents pages. Non-DZero speakers may request analyses notes to the conveners. Other analyses results are available under the Dzero Higgs group public documents.

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W(->e/mu) + jets combined results: Jet Properties
In addtion to the common selection requirements above, the following requirements are used in these channels:

Final states with electrons Electron: pT > 20 GeV, |eta| < 0.8 ET missing > 25 GeV

Final states with muons Muon: pT > 25 GeV, |eta| < 1.5 ET missing > 20 GeV

In the plots below, the dots show the combined e+jets and mu+jets collider data and the shaded bands show the predicted background. The width of the band reflects the (currently statistics limited) range allowed by the jet energy calibration.

Leading jet transverse momentum (.eps B&W and color versions)	Next to leading jet transverse momentum (.eps B&W and color versions)
Distance in R between jets (.eps B&W and color versions)	Dijet invariant mass spectrum (.eps B&W and colorversions)

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Z(->ee/mumu) + jets combined results: Jet Properties
In addtion to the common selection requirements above, the following requirements are used in these channels:

Final states with electrons Electron: pT > 20 GeV, |eta| < 2.3

Final states with muons Muon: pT > 15 GeV, |eta| < 2.0

In the plots below, the dots show the combined e+jets and mu+jets collider data and the shaded bands show the predicted background. The width of the band reflects the (currently statistics limited) range allowed by the jet energy calibration.

Inclusive jet multiplicities
(.eps B&W and color versions)

Leading jet transverse momentum (.eps B&W and color versions)	Next to leading jet transverse momentum (.eps B&W and color versions)
Distance in R between jets (.eps B&W and color versions)	Dijet invariant mass spectrum (.eps B&W and colorversions)

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Searches for Higgs in H -> WW^(*) -> ee/emu/mumu final states

These searches select events with two isolated, high p_T leptons (criteria given below) and significant ME_T. In addition requirements are made to reject Z/gamma* Drell-Yan processes and the Standard Model WW background. The latter is suppressed by exploiting the spin correlations in the WW* decay. The backgrounds tend to give dilepton pairs which are back-to-back in the plane transverse to the beam, while the signal decays give leptons which have a positive correlation in their direction. The tables show comparisons between predicted backgrounds and observed event yields in data, and the figures compare the D(phi) distributions for backgrounds and signal.

Lepton ID and analysis requirements

• Make data quality requirements based on official good run lists
• Use electron or muon triggers with measured efficiencies.
• Apply standard D0 calorimeter energy calibration (aka Jet Energy Scale)
• Have similar lepton identification requirements based on:
  • For electrons: calorimeter shower shape chi^2, EM fraction, and a E/p requirement with an associated track.
  • For muons: track segments reconstructed in the muon system, isolation from signficant energy deposition in the calorimeter and an associated track from the central tracking system. The muon momentum is taken as the central track momentum.

Lepton Kinematic Selections

ee final state e1: pT > 20 GeV e2: pT > 10 GeV

emu final state e: pT > 20 GeV mu: pT > 10 GeV

mumu final state mu1: pT > 15 GeV mu2: pT > 15 GeV

WW->ee: Predicted background, signal and observed yields as a function of selection requirement

Signal Selection Efficiency: H -> WW -> ee Channel

WW->emu: Predicted background, signal and observed yields as a function of selection requirement

Signal Selection Efficiency: H -> WW -> emu Channel

WW->mumu: Predicted background, signal and observed yields as a function of selection requirement

D(phi) distributions for the WW->ee channel

D(phi) distribution for data and various background processes after basic ID requirements (.eps version)	D(phi) distribution for the Higgs signal, data and various background processes after selection cuts (.eps version)

D(phi) distributions for the WW->emu channel

D(phi) distribution for data and various background processes after basic ID requirements

D(phi) distribution for the Higgs signal, data and various background processes after selection cuts

D(phi) distributions for the WW->mumu channel

D(phi) distribution for data and various background processes after basic ID requirements

D(phi) distribution for the Higgs signal, data and various background processes after selection cuts

Cross section times BR excluded with current data along with the expectations from various models. This result is a combination of the ee and emu analysis results.
(.eps version)