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 root s = 1.96 TeV p (p) over bar 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 -> l nu(l), W -> jets) + sigma(WZ) x BR(W -> l nu(l), 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.

Search for WW and WZ production in lepton plus jets final state at CDF / Aaltonen, T., Adelman, J., Akimoto, T., Gonzalez, B.a., 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.e., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 79:11(2009). [10.1103/physrevd.79.112011]

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

DE CECCO, Sandro;DIONISI, Carlo;GIAGU, Stefano;MARGAROLI, Fabrizio;IORI, Maurizio;LUCI, Claudio;
2009

Abstract

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 root s = 1.96 TeV p (p) over bar 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 -> l nu(l), W -> jets) + sigma(WZ) x BR(W -> l nu(l), 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.
2009
01 Pubblicazione su rivista::01a Articolo in rivista
Search for WW and WZ production in lepton plus jets final state at CDF / Aaltonen, T., Adelman, J., Akimoto, T., Gonzalez, B.a., 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.e., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 79:11(2009). [10.1103/physrevd.79.112011]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/225250
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