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that evidence of the top quark "looks really good". Over the next months it became clear that UA1 had overlooked a significant source of background. The top quark was ultimately discovered in 1994–1995 by physicists at
Fermilab with a mass near 175 GeV.
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It was named as the first experiment in a CERN "Underground Area" (UA), i.e. located underground, outside of the two main CERN sites, at an interaction point on the SPS accelerator, which had been modified to operate as a
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The UA1 was a huge and complex detector for its day. It was designed as a general-purpose detector. The detector was a 6-chamber cylindrical assembly 5.8 m long and 2.3 m in diameter, the largest imaging
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from the
Institute of Physics for their outstanding roles in the discovery of the W and Z particles.
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The UA1 detector was conceived and designed in 1978/9, with the proposal submitted in mid-1978.
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After the discovery of the W and Z boson, the UA1 collaboration went on to search for the
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Evidence for the Top Quark: Objectivity and Bias in Collaborative Experimentation
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of its day. It recorded the tracks of charged particles curving in a 0.7
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Interior of the central section of the UA1 experiment on display at the
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Museo nazionale della scienza e della tecnologia
Leonardo da Vinci
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gas mixture filling the chambers were ionised by the passage of
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The central section of the UA1 experiment on display at the
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483:"The W and Z Particles: A Personal Recollection"
368:"Physicists May Have Tracked Last Quark to Lair"
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497:"Neutral currents and W and Z: a celebration"
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329:List of Super Proton Synchrotron experiments
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469:"UA1 magnet sets off for a second new life"
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397:. Cambridge University Press. p. 80.
445:"When CERN saw the end of the alphabet"
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269:at the UA1 experiment expressed to the
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571:Super Proton Synchrotron experiments
32:Super Proton–Antiproton Synchrotron
27:Particle physics experiment at CERN
190:), a modification of the one-beam
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409:"The UA1 detector - CERN Courier"
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249:Section of the UA1 detector at
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521:-central part of UA1 detector
532:CERN-UA-01 experiment record
202:by this experiment and the
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232:Rutherford Medal and Prize
180:Proton-Antiproton Collider
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393:Staley, Kent W. (2004).
192:Super Proton Synchrotron
374:. No. 25 June 1984
174:experiment that ran at
314:neutrino experiments.
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125:Antiproton Accumulator
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166:(an abbreviation of
206:in 1983 led to the
172:high-energy physics
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505:. 9 December 2003.
372:The New York Times
366:Sullivan, Walter.
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220:Simon van der Meer
168:Underground Area 1
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115:Proton Synchrotron
106:S pre-accelerators
97:Underground Area 5
87:Underground Area 4
77:Underground Area 2
67:Underground Area 1
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214:being awarded to
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16:(Redirected from
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477:. 13 March 2008.
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491:. 1 April 2004.
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57:S Experiments
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502:CERN Courier
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488:CERN Courier
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474:CERN Courier
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450:CERN Courier
448:
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431:the original
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413:the original
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376:. Retrieved
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353:the original
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278:
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267:Carlo Rubbia
263:bottom quark
256:
236:
224:Peter Kalmus
216:Carlo Rubbia
195:
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62:
536:INSPIRE-HEP
228:John Dowell
208:Nobel Prize
1682:Categories
335:References
259:top quark
222:in 1984.
519:image of
511:image of
318:See also
253:of Milan
240:collider
170:) was a
378:23 June
212:physics
294:ethane
53:Key Sp
1667:WA103
1662:WA102
1657:WA101
1652:WA100
682:EMU20
677:EMU19
672:EMU18
667:EMU17
662:EMU16
657:EMU15
652:EMU14
647:EMU13
642:EMU12
637:EMU11
632:EMU10
308:NOMAD
290:argon
286:Tesla
1643:WA99
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1199:WA11
1194:WA10
1061:NA66
1056:NA65
1051:NA64
1046:NA63
1041:NA62
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1031:NA60
1026:NA59
1021:NA58
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900:NA37
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877:NA34
872:NA33
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858:NA31
853:NA30
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843:NA28
838:NA27
833:NA26
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627:EMU9
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612:EMU6
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597:EMU3
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380:2017
310:and
226:and
218:and
210:for
176:CERN
162:The
157:CERN
142:CERN
1189:WA9
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1174:WA6
1169:WA5
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740:NA9
735:NA8
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720:NA5
715:NA4
710:NA3
705:NA2
700:NA1
534:on
312:T2K
196:SPS
178:'s
155:at
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93:UA5
83:UA4
73:UA2
63:UA1
35:(Sp
18:UA1
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20:)
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