Elsevier

Physics Letters B

Volume 337, Issues 1–2, 6 October 1994, Pages 207-218
Physics Letters B

Search for a scalar top quark using the OPAL detector

https://doi.org/10.1016/0370-2693(94)91470-2Get rights and content

Abstract

A search for a supersymmetric partner of the top quark (t̃1) has been performed by the OPAL experiment in e+e- collisions at LEP. The integrated luminosity of the data sample analysed was 69.1 pb−1, which corresponds to 1.68 × 106 produced Z0 → qq̄ events. No t̃1 candidates have been found. This study excludes the existence of the t̃1 with a mass below 45.1 GeV at 95% C.L., where the mixing angle of left- and right-handed partners is smaller than 0.85 rad or greater than 1.15 rad, and the mass difference between the t̃1 and the lightest neutralino is greater than 5 GeV.

References (24)

  • M. Drees et al.

    Phys. Lett.

    (1990)
    K. Hikasa et al.

    Phys. Rev.

    (1987)
  • CERN-PPE/93–157

    (1993)
  • F. Abe

    FERMILAB-PUB-94-116-E

    (May 1994)
  • C. Albajar

    Phys. Lett.

    (1987)
    F. Abe

    Phys. Rev. Lett.

    (1989)
    J. Alitti

    Phys. Lett.

    (1990)
    H. Baer et al.

    Phys. Rev.

    (1991)
  • J. Shirai

    Phys. Rev. Lett.

    (1994)
  • I. Adachi

    Phys. Lett.

    (1989)
    Y. Sakai

    Phys. Lett.

    (1990)
  • K. Hagiwa et al.

    Nucl. Phys.

    (1990)
  • T. Sjöstrand

    PYTHIA 5.6 and JETSET 7.3 Physics and Manual, CERN-TH. 6488/92

    (1992)
    T. Sjöstrand

    Comp. Phys. Comm.

    (1986)
    T. Sjöstrand et al.

    Comp. Phys. Comm.

    (1987)
  • A. Ali

    Zeit. Phys.

    (1979)
    M.K. Gaillard et al.

    Rev. Mod. Phys.

    (1975)
    V. Barger et al.

    Phys. Lett.

    (1979)
    M. Suzuki

    Nucl. Phys.

    (1985)
  • G. Alexander

    Zeit. Phys.

    (1991)
  • M.G. Bowler

    Zeit. Phys.

    (1981)
  • P.D. Acton

    Zeit. Phys.

    (1993)
  • Cited by (23)

    • Search for scalar top and scalar bottom quarks at LEP

      2002, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    • Search for supersymmetric partners of top and bottom quarks at √s= 189 GeV

      2000, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    • Search for scalar top and scalar bottom quarks at √s = 189 GeV at LEP

      1999, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    • Search for scalar top and scalar bottom quarks using the OPAL detector at LEP

      1996, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    View all citing articles on Scopus
    1

    TRIUMF, Vancouver, Canada V6T 2A3

    View full text