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Gösta Gustafson. Photo.

Gösta Gustafson

Post retirement professor

Gösta Gustafson. Photo.

String effects on Fermi-Dirac correlation measurements

Author

  • R. M. Duran Delgado
  • Gösta Gustafson
  • Leif Lönnblad

Summary, in English

We investigate some recent measurements of Fermi-Dirac correlations by the LEP collaborations indicating surprisingly small source radii for the production of baryons in e(+)e(-) annihilation at the Z(0) peak. In hadronization models there is besides the Fermi-Dirac correlation effect also a strong dynamical (anti-) correlation. We demonstrate that the extraction of the pure FD effect is highly dependent on a realistic Monte Carlo event generator, both for separation of those dynamical correlations that are not related to Fermi-Dirac statistics, and for corrections of the data and background subtractions. Although the model can be tuned to well reproduce single particle distributions, there are large model uncertainties when it comes to correlations between identical baryons. We therefore, unfortunately, have to conclude that it is at present not possible to draw any firm conclusion about the source radii relevant for baryon production at LEP.

Department/s

  • Theoretical Particle Physics

Publishing year

2007

Language

English

Pages

113-119

Publication/Series

European Physical Journal C. Particles and Fields

Volume

52

Issue

1

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044