Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW LETTERS 101, 251802 (2008). Copyright © 2008 The American Physical Society. Used by permission.


We report a search for the standard model Higgs boson in the missing energy and acoplanar b-jet topology, using an integrated luminosity of 0.93 fb-1 recorded by the D0 detector at the Fermilab Tevatron pp Collider. The analysis includes signal contributions from ppZHννbb, as well as from WH production in which the charged lepton from the W boson decay is undetected. Neural networks are used to separate signal from background. In the absence of a signal, we set limits on σ (ppVH) x B(H → bb) at the 95% C.L. of 2.6–2.3 pb, for Higgs boson masses in the range 105–135 GeV, where V = W, Z. The corresponding expected limits range from 2.8 to 2.0 pb.

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