Observation of the top quark

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作者：
Protopopescu, S
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NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS | 1996年 / 109卷 / 6-7期
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O412 [相对论、场论]; O572.2 [粒子物理学];
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摘要：
The D0 Collaboration reports on a search for the Standard Model top quark in p (p) over bar collisions at root s = 1.8 TeV at the Fermilab Tevatron, with an integrated luminosity of approximately 50 pb(-1). We have searched for t (t) over bar 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 +/- 0.6 events. The probability for an upward fluctuation of the background to produce the observed signal is 2 . 10(-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(-21)(+19)(stat) +/- 22(syst) GeV/c(2) and its production cross-section to be (6.4 +/- 2.2) pb.
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页码：755 / 769
页数：15
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