Top decay to lepton+jets: CDF B tags and cross section

Conference · Mon May 12 00:00:00 EDT 2008 · AIP Conf.Proc.

DOI:https://doi.org/10.1063/1.49673· OSTI ID:111896

Incandela, J. ^[1]

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1. Fermilab

The top search in the lepton plus jets channel with the Collider Detector at Fermilab (CDF) is presented. The analysis uses a 67 pb−1 data sample of pp̄ collisions at √s=1.8 TeV. Soft lepton tagging (SLT) and secondary vertex tagging (SVX) of b jets are used to reduce backgrounds. A significant excess of events over expected backgrounds is seen, and together with the excess of observed events in the dilepton (DIL) channel, firmly establish the existence of the top quark. Combining all channels, the tt̄ production cross section is measured to be σ tt̄ =7.6−2.0 +2.4 pb. The Branching of top to Wb is measured to be Br(t→Wb)=0.87+0.13 −0.30(stat)+0.13 −0.11(syst).

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, 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: 111896
• Report Number(s): FERMILAB-CONF-95-162-E; CDF-PUB-TOP-3209; oai:inspirehep.net:396742
• Journal Information: AIP Conf.Proc., Journal Name: AIP Conf.Proc. Vol. 357
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CROSS SECTIONS
EXPERIMENTAL DATA
FERMILAB TEVATRON
JETS
LEPTONS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
SEMILEPTONIC DECAY
T QUARKS
TEV RANGE 01-10
WEAK HADRONIC DECAY