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Abstract:
The Higgs particle is the last undiscovered particle of the Standard Model of
Particle Physics (SM). A search for SM Higgs decays in the four
lepton final state is conducted using 8.2 fb-1 of data of p-pbar collisions collected
by the CDF-II detector at Fermilab's Tevatron accelerator. We reconstruct
the three final states of four electrons (4e),
four muons (4μ) and pairs of electrons and muons (2e2μ) in the range
50 GeV/c² to 600 GeV/c² of the four lepton invariant mass.
Our search is optimized for Higgs decays to Z-boson pairs but is also sensitive to the
W-boson pair decay channel, where the Higgs is produced in association with a Z boson that
decays to charged leptons. We expect contributions from non-resonant ZZ production and fakes of
8.9 ± 1.2 and 0.3 ± 0.1 events, respectively.
In the data we observe 8 events, which is consistent
with no events from Higgs boson decays, therefore we extract upper limits for the cross-section of
Higgs production.
Our most stringent limits above and below the threshold for on-shell production of ZZ are set at Higgs masses
of 150 GeV/c² and 200 GeV/c² with observed
cross-sections of above 15.5 and 9.3 times that of the SM ruled out at the
95% confidence level, respectively.
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Supporting Documents:
The results were first presented at EPS 2011
More details are provided in the public note
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General Remarks:
The preliminary results were blessed in the Higgs group on July 15, 2011
Please contact us
if you have any questions about including these results in a presentation
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