Skip to main content
Log in

Improved measurements of the neutral current from hadron and lepton production at LEP

  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

We present an update with increased statistics to our published analysis of hadronic and leptonic cross sections and of the leptonic forward-backward asymmetries ine + e collisions. The published results were based on a total 454 000 hadronic and 58 000 leptonic events. This analysis adds 733 000 hadronic and 88 000 leptonic events recorded at theZ 0 peak in 1992 by the OPAL experiment at LEP. A model independent analysis ofZ 0 parameters based on an extension of the improved Born approximation leads to tests of lepton universality and gives an interpretation of the results within the Standard Model framework. We also present a model independent test for new physics.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. OPAL Coll., P.D. Acton et al.: Z. Phys. C58 (1993) 219

    Google Scholar 

  2. OPAL Coll., G. Alexander et al.: Z. Phys. C52 (1991) 175

    Google Scholar 

  3. OPAL Coll., K. Ahmet et al.: Nucl. Instrum. Methods A305 (1991) 275

    Google Scholar 

  4. JETSET, Version 7.3; T. Sjöstrand: Comput. Phys. Commun. 39 (1986) 347; T. Sjöstrand, M. Bengtsson: Comput. Phys. Commun. 43 (1987) 367; T. Sjöstrand: CERN-TH/6488/92

    Google Scholar 

  5. HERWIG, Version 5.5; G. Marchesini, B.R. Webber: Nucl. Phys. B310 (1988) 461; G. Marchesini et al.: Comput. Phys. Commun. 67 (1992) 465

    Google Scholar 

  6. OPAL Coll., M.Z. Akrawy et al.: Z. Phys. C47 (1990) 505; OPAL Coll., P.D. Acton et al.: Z. Phys. C58 (1993) 387

    Google Scholar 

  7. S. Jadach et al.: Comput. Phys. Commun. 66 (1991) 276

    Google Scholar 

  8. M. Böhm, A. Denner, W. Hollik: Nucl. Phys. B304 (1988) 687; F.A. Berends, R. Kleiss, W. Hollik: Nucl. Phys. B304 (1988) 712

    Google Scholar 

  9. S. Jadach et al.: Comput. Phys. Commun. 70 (1992) 305

    Google Scholar 

  10. J. Allison et al.: Nucl. Instrum. Methods A317 (1992) 47

    Google Scholar 

  11. B.E. Anderson et al.: Nucl. Instrum. Methods A283 (1989) 650; D.C. Imrie et al.: Nucl. Instrum. Methods A283 (1989) 515

    Google Scholar 

  12. R. Brun et al.: GEANT 3, Report DD/EE/84-1, CERN (1989)

  13. W. Beenakker et al.: Nucl. Phys. B349 (1991) 323

    Google Scholar 

  14. L. Arnaudon et al.: CERN-PPE/92-125; CERN-SL/92-37 (DI); Working group on LEP energy and the LEP Collaborations: Phys. Lett. B307 (1993) 187

  15. L. Arnaudon et al.: CERN SL/93-21 (DI), 1993

  16. Line shape program ZFITTER, version 4.6, Dubna-Zeuthen rediative correction group; D. Bardin et al.: Comput. Phys. Commun. 59 (1990) 303: Z. Phys. C44 (1989) 493; Nucl. Phys. B351 (1991) 1; Phys. Lett. B229 (1989) 405; CERN-TH 6443/92 (1992)

    Google Scholar 

  17. M. Consoli, W. Hollik: Proceedings of the Workshop on Z Physics at LEP1, CERN 89-08, 1989, G. Altarelli et al. (eds.), Vol. 1 (1989) 7

  18. CDF Coll., F. Abe et al.: Phys. Rev. Lett. 65 (1990) 2243; Phys. Rev. D43 (1991) 2070; UA2 Coll., J. Alitti et al.: Phys. Lett. B276 (1992) 354

    Google Scholar 

  19. OPAL Coll., P.D. Acton et al.: Z. Phys. C55 (1992) 1

    Google Scholar 

  20. G. Altarelli, R. Barbieri, F. Caravaglios: Nucl. Phys. B405 (1993) 3; G. Altarelli, R. Barbieri, F. Caravaglios: CERN TH 6859-93; G. Altarelli, R. Barbieri, S. Jadach: Nucl. Phys. B369 (1992) 3; E: Nucl. Phys. B376 (1992) 444

    Google Scholar 

  21. G. Burgers et al.: Proceedings of the Workshop on Z Physics at LEP1, CERN 89-08, 1989, G. Altarelli et al. (eds.), Vol. 1 (1989) 55

  22. ALEPH Coll., D. Decamp et al.: Z. Phys. C53 (1992) 1; DELPHI Coll., P. Abreu et al.: Nucl. Phys. B 367 (1991) 511; L3 Coll., B. Adeva et al.: Z. Phys. C51 (1991) 179; The LEP Collaborations: ALEPH, DELPHI, L3 and OPAL: Phys. Lett. B276 (1992) 247; ALEPH Coll., D. Buskulic et al.: Z. Phys. C60 (1993) 71; L3 Coll., O. Adriani et al.: CERN-PPE/93-31

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Consortia

Rights and permissions

Reprints and permissions

About this article

Cite this article

OPAL Collaboration., Akers, R., Alexander, G. et al. Improved measurements of the neutral current from hadron and lepton production at LEP. Z. Phys. C - Particles and Fields 61, 19–34 (1994). https://doi.org/10.1007/BF01641883

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01641883

Keywords

Navigation