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Yano-Koonin-Podgoretskii parametrisation of the Hanbury Brown-Twiss correlator

  • Y.-F. Wu
  • U. Heinz
  • B. Tomášik
  • U.A. Wiedemann
Theoretical physics

The Yano-Koonin-Podgoretskii (YKP) parametrisation of Hanbury Brown-Twiss (HBT) two-particle correlation functions opens new strategies for extracting the emission duration and testing the longitudinal expansion in heavy-ion collisions. Based on the recently derived model-independent expressions, we present a detailed parameter study of the YKP parameters for a finite, hydrodynamically expanding source model of heavy-ion collisions. For the class of models studied here, we show that the three YKP radius parameters have an interpretation as longitudinal extension, transverse extension and emission duration of the source in the YKP frame. This frame is specified by the fourth fit parameter, the Yano-Koonin velocity which describes to a good approximation the velocity of the fluid element with highest emissivity and allows to test for the longitudinal expansion of the source. Deviations from this interpretation of the YKP parameters are discussed quantitatively.

Keywords

Correlation Function Parameter Study Source Model High Emissivity Fluid Element 
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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Y.-F. Wu
    • 1
  • U. Heinz
    • 1
  • B. Tomášik
    • 1
  • U.A. Wiedemann
    • 1
  1. 1. Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany DE

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