A Search For The Higgs Boson In Its Associated Production With A W Vector Boson in p¯p Collisions at √s = 1.96 TeV
Abstract
We present the results of a search for the Standard Model Higgs boson in its associated
production with a W vector boson in p¯p collisions at √s = 1.96 TeV using the complete Run
IIA dataset with an integrated luminosity of 1.04 fb−1 collected by the DØ experiment. The
salient features of this analysis are the extended geometric acceptance by including the pseudorapidity
covered by the end cap calorimeter, optimization in b-tagging and event selection
criteria. We observe very good agreement in the data compared to the expectation form the
modeling of Standard Model background for the WH signal. No excess events in data are observed
over the predicted background. We establish that the evidence for observing the Higgs
boson in this channel is inconclusive and proceed to set upper cross section limits on the associated
WH production at 95% confidence level. We derive the cross section upper limits for
the Higgs mass (mH) ranging from 105 GeV/c2 to 145 GeV/c2. For mH = 115 GeV/c2, the
observed (expected) upper limit is 0.8 (0.9) pb compared to the Standard Model expectation of
0.13 pb.