Search for the Standard Model Higgs Boson in the Decay Channel $H$ to $Z Z$ to 4 Leptons in $pp$ Collisions at $\sqrt{s}=7$ TeV

A search for a Higgs boson in the four-lepton decay channel H to ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range 110 < mH < 600 GeV. The analysis uses data corresponding to an integrated luminosity of 4.7 inverse femtobarns recorded by the CMS detector in pp collisions at sqrt(s) = 7 TeV from the LHC. Seventy-two events are observed with four-lepton invariant mass m[4 leptons] > 100 GeV (with thirteen below 160 GeV), while 67.1 +/- 6.0 (9.5 +/-1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges 134-158 GeV, 180-305 GeV, and 340 -465 GeV. Small excesses of events are observed around masses of 119, 126, and 320 GeV, making the observed limits weaker than expected in the absence of a signal.

Note:

Submitted to Physical Review Letters

p p: scattering
Higgs particle: mass
CERN LHC Coll
mass spectrum: (4lepton)
CMS
Higgs particle: search for
Higgs particle: decay
Z0: pair production
Z0: leptonic decay
channel cross section: background: upper limit

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