We search for the standard model Higgs boson produced in
association with an electroweak vector boson in events with no identified
charged leptons, large imbalance in transverse momentum, and two jets
where at least one contains a secondary vertex consistent with the decay
of b hadrons. We use ~1 fb-1 integrated luminosity of p anti-p collisions
at sqrt s = 1.96 TeV recorded by the CDF II experiment at the Tevatron.
We find 268 (16) single (double) b-tagged candidate events, where 248 +/-
43 (14.4 +/- 2.7) are expected from standard model background processes.
We place 95% confidence level upper limits on the Higgs boson production
cross section for several Higgs boson masses ranging from 110 GeV/c2 to
140 GeV/c2. For a mass of 115 GeV/c2 the observed (expected) limit is
20.4 (14.2) times the standard model prediction.
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Updated: Thursday, 2008 June 05 15:53:50 CDT automatically from input from carol picciolo