We present a search for WW and WZ production in final
states that contain a charged lepton (electron or muon) and at least
two jets, produced in s**(1/2) ñ.96 TeV p anti-p collisions at the
Fermilab Tevatron, using data corresponding to 1.2 fb-1 of integrated
luminosity collected with the CDF II detector. Diboson production in
this decay channel has yet to be observed at hadron colliders due to
the large single W plus jets background. An artificial neural network
has been developed to increase signal sensitivity, as compared with an
event selection based on conventional cuts. We set a 95% confidence
level upper limit of sigma_WW x BR(W --> ell_nu_ell, W --> jets) +
sigma_WZ x BR(W --> ell_nu_ell, Z --> jets) < 2.88 pb, which is
consistent with the standard model next to leading order cross section
calculation for this decay channel of 2.09 +/- 0.12 pb.
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Updated: Tuesday, 2009 June 30 12:07:45 CDT automatically from input from carol picciolo