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

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=1.96TeV pp̄ collisions at the Fermilab Tevatron, using data corresponding to 1.2fb-1 of integrated luminosity collected with the CDF II detector. Diboson...

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Príomhchruthaitheoirí: Aaltonen, T, Adelman, J, Akimoto, T, Alvarez Gonzalez, B, Amerio, S, Amidei, D, Anastassov, A, Annovi, A, Antos, J, Apollinari, G, Apresyan, A, Arisawa, T, Artikov, A, Ashmanskas, W, Attal, A, Aurisano, A, Azfar, F, Badgett, W, Barbaro-Galtieri, A, Barnes, V, Barnett, B, Barria, P, Bartsch, V, Bauer, G, Beauchemin, P
Formáid: Journal article
Teanga:English
Foilsithe / Cruthaithe: 2009
Cur síos
Achoimre: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=1.96TeV pp̄ collisions at the Fermilab Tevatron, using data corresponding to 1.2fb-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 σWW×BR(W→ν,W→jets)+σWZ×BR(W→ ν ,Z→jets)<2.88pb, which is consistent with the standard model next-to-leading-order cross section calculation for this decay channel of 2.09±0.12pb. © 2009 The American Physical Society.

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