Published March 1990 | Version v1
Journal article

Search for top quark production at the CERN anti pp collider

Creators

  • 1. Paris-11 Univ., 91 - Orsay (France). Lab. de l'Accelerateur Lineaire
  • 2. CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)
  • 3. Cambridge Univ. (UK). Cavendish Lab.
  • 4. European Organization for Nuclear Research, Geneva (Switzerland)
  • 5. Istituto Nazionale di Fisica Nucleare, Milan (Italy)
  • 6. Milan Univ. (Italy). Dipt. di Fisica
  • 7. Bern Univ. (Switzerland). Lab. fuer Hochenergiephysik
  • 8. Istituto Nazionale di Fisica Nucleare, Pisa (Italy)
  • 9. Pisa Univ. (Italy)
  • 10. Istituto Nazionale di Fisica Nucleare, Perugia (Italy)
  • 11. Perugia Univ. (Italy). Dipartimento di Fisica
  • 12. Istituto Nazionale di Fisica Nucleare, Pavia (Italy)
  • 13. Pavia Univ. (Italy)
  • 14. Heidelberg Univ. (Germany, F.R.). Inst. fuer Hochenergiephysik

Description

The upgraded UA2 detector has collected data corresponding to a total integrated luminosity of 7.5 pb-1 from anti pp collisions at a centre of mass energy of 630 GeV during 1988 and 1989. A search has been performed for the production and decay of the top quark (t) or a member of a hypothetical fourth family (b'). No evidence has been found for such processes. Using the expected rates for production and decay branching ratios from the Standard Model, this implies that the top quark mass is greater than 69(71) GeV/c2, and that the b' mass is greater than 54(57) GeV/c2, at 95(90)% confidence. (orig.)

Additional details

Publishing Information

Journal Title
Zeitschrift fuer Physik, C
Journal Volume
46
Journal Issue
2
Series
Z. Phys., C.
Journal Page Range
179-189
ISSN
0170-9739
CODEN
ZPCFD

Optional Information

Collaborations
UA2 Collaboration.