CDF RESULTS ON TOP

1996 ◽  
Vol 11 (12) ◽  
pp. 2045-2064
Author(s):  
ANDREW BERETVAS
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Quark Mass ◽  
Production Cross ◽  
Secondary Vertex ◽  
Top Quark Mass ◽  
Final State ◽  
Vertex Detector ◽  
Text Production ◽  
Integrated Luminosity

CDF has established the existence of the top quark. Results from [Formula: see text] collisions at [Formula: see text] TeV are presented. In the dilepton final state we find seven events with a background of 1.3±0.3. In the e, μ+v+jets channel with a b identified via a secondary vertex detector (SVX), we find 21 events with a background of 5.5±1.8. We measure the top quark mass to be 176±8 (stat) ±10 (syst) GeV/c2, and the [Formula: see text] production cross section to be [Formula: see text] . The integrated luminosity for the results presented in this paper is 67 pb−1. The CDF detector needs to be upgraded for our next run. The integrated luminosity for the next run is expected to be more than 1000 pb −1.

scholarly journals Measurement of the tt¯ production cross section and top quark mass extraction using dilepton events in pp¯ collisions

2009 ◽  
Vol 679 (3) ◽  
pp. 177-185 ◽  
Author(s):  
V.M. Abazov ◽  
B. Abbott ◽  
M. Abolins ◽  
B.S. Acharya ◽  
M. Adams ◽  
...  
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Quark Mass ◽  
Production Cross ◽  
Top Quark Mass ◽  
Dilepton Events

scholarly journals Evidence for Top Quark Production in pp Collisions at vs = 1.8 TeV

1995 ◽  
Vol 48 (2) ◽  
pp. 207
Author(s):  
Paul L Tipton for the CDF Collaboration
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Quark Mass ◽  
W Boson ◽  
Production Cross ◽  
W Bosons ◽  
Top Quark Mass ◽  
Pp Collisions ◽  
Top Quark Production ◽  
Quark Production

We summarise a search for the top quark with the Collider Detector at Fermilab (CDF) in a sample of pp collisions at Vs = 1� 8 Te V with an integrated luminosity of 19�3 pb ~ 1. We find 12 events consistent with either two W bosons, or a W boson and at least one b jet. Both of these are signatures for tt events. The probability that the measured yield is consistent with the background is 0�26%. Though the statistics are too limited to establish firmly the existence of the top quark, a natural interpretation of the excess is that it is due to tt production. Under this assumption, constrained fits to individual events yield a top quark mass of 174 � lO:::g GeV / c2? The tt production cross section is measured to be 13.9:::~:~ pb.

OBSERVATION OF THE TOP QUARK

1996 ◽  
Vol 11 (21) ◽  
pp. 3819-3848
Author(s):  
SOO-BONG KIM
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Production Cross ◽  
Top Quark Mass ◽  
Text Production ◽  
Top Quark Production ◽  
Top Quark Decay ◽  
Quark Production ◽  
Quark Decay ◽  
Kinematic Properties

Top-quark production is observed in [Formula: see text] collisions at [Formula: see text] at the Fermilab Tevatron. The CDF and DØ collaborations observe signals consistent with [Formula: see text] to [Formula: see text] but inconsistent with the background prediction by 4.8σ (CDF) and 4.6σ (DØ). Additional evidence for the top quark is provided by a peak in the reconstructed mass distribution. The kinematic properties of the excess events are consistent with the top-quark decay. The top-quark mass has been measured to be 176±8 (stat.) ±10 (sys.) GeV /c2 (CDF) and [Formula: see text]±22(sys.)GeV/c2 (DØ), and the [Formula: see text]-production cross section to be [Formula: see text] and 6.4±2.2 pb (DØ).

scholarly journals Measurement of the Top Quark Mass andtt¯Production Cross Section from Dilepton Events at the Collider Detector at Fermilab

1998 ◽  
Vol 80 (13) ◽  
pp. 2779-2784 ◽  
Author(s):  
F. Abe ◽  
H. Akimoto ◽  
A. Akopian ◽  
M. G. Albrow ◽  
A. Amadon ◽  
...  
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Quark Mass ◽  
Production Cross ◽  
Top Quark Mass ◽  
Dilepton Events

scholarly journals Measurements of the $t{\bar t}$ production cross section at the Tevatron Run II CDF experiment using b-tagging

2005 ◽  
Vol 20 (14) ◽  
pp. 3180-3182
Author(s):  
Henri Bachacou
Keyword(s):  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Transverse Energy ◽  
Production Cross ◽  
Secondary Vertex ◽  
Top Quark Mass ◽  
Lepton Jets ◽  
B Tagging ◽  
Text Signal

We present measurements of the [Formula: see text] production cross section in b-tagged lepton + jets events from [Formula: see text] collisions at 1.96 TeV using the CDF detector at Fermilab. B-jets are tagged with either a secondary vertex algorithm, or a soft lepton tagger that identifies muons from B hadron semileptonic decays. With Tevatron Run II data, we estimate the [Formula: see text] signal fraction in two different ways: by estimating the various background contributions, and by fitting directly the leading jet transverse energy spectrum for the signal and background contributions. A subset of the sample, with two secondary vertex tagged jets, yields a production cross section consistent with the inclusive measurements. Results are consistent with a Standard Model [Formula: see text] signal and current measurements of the top quark mass.

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