Search for WW and WZ production in lepton plus jets final state at CDF

Details Search for WW and WZ production in lepton plus jets final state at CDF Search for WW and WZ production in lepton plus jets final state at CDF

2009-03-04

arxiv.org/abs/0903.0814v1

Phys.Rev.D79:112011,2009

Physics

High Energy Physics

High Energy Physics - Experiment

submitted to Phys. Rev. D (RC)

Scientific paper

10.1103/PhysRevD.79.112011

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 sqrt(s) = 1.96 TeV ppbar 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}* BR(W->lnu,W->jets)+ sigma_{WZ}*BR(W->lnu,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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