Search for WW and WZ Production in Lepton Plus Jets Final State at CDF

Journal Article · Sun Mar 01 04:00:00 EST 2009 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.79.112011· OSTI ID:1847852

Aaltonen, T.

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 $$\sigma_{WW}$$ x BR($$W \to l{\nu}_l, W \to jets$$) + $$\sigma_{WZ}$$ x BR($$W \to l{\nu}_l, Z \to jets$$) <2.88 pb, which is consistent with the standard model next to leading order cross section calculation for this decay channel of $$2.09 \pm 0.12 pb$$.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: CDF
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1847852
• Report Number(s): FERMILAB-PUB-09-054-E; arXiv:0903.0814; oai:inspirehep.net:814737
• Journal Information: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 79
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS