Advertisement

Model-independent constraints on contact interactions from LEP2 data analysis

  • A.A. Babich
  • G. Della Ricca
  • J. Holt
  • P. Osland
  • A.A. Pankov
  • N. Paver
Theoretical Physics

Abstract.

We derive model-independent constraints on four-fermion contact interaction-type dynamics from the published preliminary LEP2 experimental data on e + e - annihilation into \(\mu^+\mu^-\) and \(\tau^+\tau^-\) pairs, measured at different energies between 130 and 207 GeV. The basic observables are chosen to be the total cross section and the forward-backward asymmetry, and the analysis realistically takes into account data uncertainties and correlations among measurements at the various energies. The combination of data from different energy points plays an important role in the determination of regions allowed for the contact interaction coupling constants. In contrast to the more common one-parameter analyses, we only obtain constraints on pairs of parameters rather than limits on individual ones.

Keywords

Experimental Data Data Analysis Total Cross Section Contact Interaction Energy Point 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2003

Authors and Affiliations

  • A.A. Babich
    • 1
  • G. Della Ricca
    • 2
  • J. Holt
    • 3
  • P. Osland
    • 4
  • A.A. Pankov
    • 1
  • N. Paver
    • 2
  1. 1.Pavel Sukhoi Technical University, Gomel 246746, Belarus BY
  2. 2. University of Trieste and INFN-Sezione di Trieste, 34100 Trieste, Italy IT
  3. 3. CERN, 1211 Geneva 23, Switzerland CH
  4. 4. Department of Physics, University of Bergen, Allégaten 55, 5007 Bergen, Norway NO

Personalised recommendations