Elsevier

Nuclear Physics B

Volume 349, Issue 1, 28 January 1991, Pages 48-70
Nuclear Physics B

bb-production on the Z-resonance: A challenge to the standard model

https://doi.org/10.1016/0550-3213(91)90187-3Get rights and content

Abstract

We study the potentialities for exposing physics beyond the standard model that are offered by accurate measurements of the process Zbb in a high luminosity phase at LEP. In particular we propose a strategy by defining observables in such a way that they are separately sensitive to different kinds of New Physics. This approach enables us to show that with 107−108 produced Z from analysis of bb pairs one may either obtain very stringent bounds on the extra neutral gauge bosons sector, or identify it unambigously. Also, it appears that Zbb provides under those circumstances a privileged tool to reveal clean virtual effects of supersymmetry.

References (31)

  • M. Veltman

    Nucl. Phys.

    (1977)
  • A.A. Akhundov et al.

    Nucl. Phys.

    (1986)
    W. Beenakker et al.

    Z. Phys.

    (1988)
  • G. Girardi et al.

    Phys. Lett.

    (1990)
  • F. Boudjema et al.

    Nucl. Phys.

    (1989)
  • B.W. Lynn, in Polarization at LEP, CERN Yellow Book 88-06; and in CERN Yellow Book...
  • D. London et al.

    Phys. Rev.

    (1986)
  • R.N. Mohapatra et al.

    Phys. Rev.

    (1981)
  • R. Barbieri et al., in Z-physics at LEP 1, CERN Yellow Book...
  • P.K. Sinervo
  • G. Alexander, G. Altarelli, A. Blondel, G. Coignet, E. Keil, D.E. Plane and D. Treille, ed., Polarization at LEP, CERN...
  • G. Altarelli, R. Kleiss and C. Verzegnassi, ed., Z-physics at LEP 1, CERN Yellow Book...
  • B.W. Lynn, M.E. Peskin and R.G. Stuart, in CERN Yellow Book 86-02, ed. J. Ellis and R. Peccei, p....
  • F. Boudjema et al.

    Phys. Lett.

    (1990)
  • W. Hollik, in Polarization at LEP, CERN Yellow Book...A. Djouadi et al.

    Phys. Lett.

    (1990)
  • H. Nilles

    Phys. Rep.

    (1984)
    R. Barbieri

    Riv. Nuovo Cimento

    (1988)
  • Cited by (0)

    Supported in part by the German Bundesministerium für Forschung und Technologie.

    ∗∗

    On leave of absence from Department of Theoretical Physics, Trieste, and INFN, Sezione di Trieste, Italy.

    ∗∗∗

    Unité associée au CNRS no. URA 768, PM/90-10.

    View full text