Observation of the top quark

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The D0 collaboration reports on a search for the Standard Model top quark in p{bar p} collisions at {radical}s = 1.8 TeV at the Femlilab Tevatron, with an integrated luminosity of approximately 50 pb{sup {minus}1}. We have searched for t{bar t} production in the dilepton and single-lepton decay channels, with and without tagging of b quark jets. We observe 17 events with an expected background of 3.8 {plus_minus} 0.6 events. The probability for an upward fluctuation of the background to produce the observed signal is 2 {delta} 10{sup {minus}6} (equivalent to 4.6 standard deviations). The kinematic properties of the excess ... continued below

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10 p.

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Thompson, J. May 1, 1995.

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Description

The D0 collaboration reports on a search for the Standard Model top quark in p{bar p} collisions at {radical}s = 1.8 TeV at the Femlilab Tevatron, with an integrated luminosity of approximately 50 pb{sup {minus}1}. We have searched for t{bar t} production in the dilepton and single-lepton decay channels, with and without tagging of b quark jets. We observe 17 events with an expected background of 3.8 {plus_minus} 0.6 events. The probability for an upward fluctuation of the background to produce the observed signal is 2 {delta} 10{sup {minus}6} (equivalent to 4.6 standard deviations). The kinematic properties of the excess events are consistent with top quark decay. We conclude that we have observed the top quark and measure its mass to be 199{sub {minus}21}{sup +19} (stat.) {plus_minus}22 (syst.) GeV/c{sup 2} and its production cross section to be 6.4 {plus_minus} 2.2 pb.

Physical Description

10 p.

Notes

INIS; OSTI as DE95013584

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  • Rencontres de Moriond on QCD and high energy interactions, Les Arcs (France), 11-26 Mar 1995

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  • Other: DE95013584
  • Report No.: FNAL/C--95/106-E
  • Report No.: CONF-9503158--5
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/79708 | External Link
  • Office of Scientific & Technical Information Report Number: 79708
  • Archival Resource Key: ark:/67531/metadc743081

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 1, 1995

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Nov. 7, 2017, 7:27 p.m.

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Thompson, J. Observation of the top quark, report, May 1, 1995; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc743081/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.