We present a search for the standard model Higgs boson produced
in association with a W± boson. This search uses data corresponding to an
integrated luminosity of 7.5 fb-1 collected by the CDF detector at
the Tevatron. We select WH→ℓνbb̅ candidate events with two jets,
large missing transverse energy, and exactly one charged lepton. We
further require that at least one jet be identified to originate from a
bottom quark. Discrimination between the signal and the large background
is achieved through the use of a Bayesian artificial neural network. The
number of tagged events and their distributions are consistent with
the standard model expectations. We observe no evidence for a Higgs
boson signal and set 95% C.L. upper limits on the WH production cross
section times the branching ratio to decay to bb̅ pairs, σ(pp̅
→W±H)×B(H→bb̅ ), relative to the rate predicted by the standard
model. For the Higgs boson mass range of 100 to 150 GeV/c2 we set
observed (expected) upper limits from 1.34 (1.83) to 38.8 (23.4). For
115 GeV/c2 the upper limit is 3.64 (2.78). The combination of
the present search with an independent analysis that selects events
with three jets yields more stringent limits ranging from 1.12 (1.79)
to 34.4 (21.6) in the same mass range. For 115 and 125 GeV/c2 the
upper limits are 2.65 (2.60) and 4.36 (3.69), respectively.
Return to top of page.
Go to Physics Results
Updated: Wednesday, 2012 October 17 11:20:30 CDT automatically from input from Stephanie A Schuler