1995
DOI: 10.1103/physrevd.52.4877
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Top quark search with the D0 1992–1993 data sample

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Cited by 81 publications
(39 citation statements)
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“…This is based on the observation that the number of W + jets events falls off exponentially with the number of jets. 52,80 Thus, after subtracting the contribution from QCD multijets background, DØ extrapolates from the number of ℓ + jets events observed at low multiplicities to estimate the number of W + jets events with at least four jets. The efficiency for these W + jets events to pass the (A, H T ) requirement is estimated using vecbos.…”
Section: Lepton+jets Channelsmentioning
confidence: 99%
See 1 more Smart Citation
“…This is based on the observation that the number of W + jets events falls off exponentially with the number of jets. 52,80 Thus, after subtracting the contribution from QCD multijets background, DØ extrapolates from the number of ℓ + jets events observed at low multiplicities to estimate the number of W + jets events with at least four jets. The efficiency for these W + jets events to pass the (A, H T ) requirement is estimated using vecbos.…”
Section: Lepton+jets Channelsmentioning
confidence: 99%
“…The power of such variables to discriminate signal from background was recognized early on, 63 and was first applied to good effect by DØ. 52,76 With this final cut, the sample is reduced to eight events with an estimated background of 1.3±0.3 events. The CDF collaboration then estimates the top quark mass using two different methods.…”
Section: Dilepton Channelsmentioning
confidence: 99%
“…A detailed description of these cuts can be found in Refs. [2,4]. In the single-lepton plus jets channels, cuts on aplanarity, A, and E W T are used to help remove backgrounds, where E W T is dened as the scalar sum of the E T of the lepton and E / T .…”
Section: Top Cross Sectionmentioning
confidence: 99%
“…There were 2827 events in this initial data sample. Electrons and muons in these events were then required to pass the quality cuts described below.Electrons were required to have transverse and longitudinal shower profiles consistent with expectations based on detailed Monte Carlo studies [10], to have no more than two tracks pointing to the calorimeter cluster, and to have an electromagnetic isolation I < 0.15, where I = [E tot − E EM ]/E EM , E tot is the total cluster energy inside a cone of radius R = 0.4, and E EM is the electromagnetic energy inside a cone of R = 0.2. For electrons with E T between 5 and 10 GeV, the isolation cut was relaxed to I< 0.2 to increase efficiency.…”
mentioning
confidence: 99%
“…Muons were required to have a separation from any jet of at least R = 0.5, to be aligned with minimum ionizing energy deposition in at least 50% of all calorimeter layers and in at least 60% of the hadronic calorimeter layers, and to have either a matching track in the central detectors or impact parameters in the rz (bend) and xy (non-bend) views consistent with the muon having been produced at the primary event vertex [10]. To reduce cosmic ray background, muons were required to be in time with the beam crossing and any muon pair having both polar and azimuthal opening angles greater than 165…”
mentioning
confidence: 99%