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.

T., A., J., A., T., A., B. A., G., S., A., D., A., et al. (2009). Search for WW and WZ production in lepton plus jets final state at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79, 112011-1-112011-9 [10.1103/PhysRevD.79.112011].

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

CIOCCI, MARIA AGNESE;
2009-01-01

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
T., A., J., A., T., A., B. A., G., S., A., D., A., et al. (2009). Search for WW and WZ production in lepton plus jets final state at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79, 112011-1-112011-9 [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/11365/38406
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