Results for muon channel

Results from the fits:

The fit was done minimising a chi^2 function where bin containing less than 10 events were discarded. The fit procedure considered effects from statistical fluctuations of the MC samples used in the fit. The results are shown below: The first error is the statistical error from the data, and the second error is the contribution from MC which was estimated (about 60%) using toy MC.

r_bb = 1.021 ± 0.027 ± 0.020
r_cc = 0.89 ± 0.34 ± 0.25
r_gg = 0.91 ± 0.31 ± 0.23

More details here.

Event reconstruction and selection

• Two muon candidates with opposite charges, identified using neural networks, momentum > 20 GeV and isolated (no track in a cone of 5o around the candidate) were combined into a Z boson candidate. If more than one Z candidate is found, the one with mass closest to the nominal (PDG) mass is considered.
• After the di-lepton from Z decay is identified, the other remaining particles are force into two jets. The di-jet system is combined in a Higgs candidate.
• Only events with at least 25 reconstructed particles are taken.
• 70 < M_ll < 110 GeV
• 117 < M_rec < 150 GeV
• 100 < M_jj < 140 GeV
• | cos theta_ll | < 0.9

where M_ll is the mass of the di-lepton, M_jj is the mass of the di-jet, M_rec is the recoil mass and theta_ll is the polar angle of the di-lepton.