Intriguing Centrality Dependence of the Au-Au Source Size at the AGS

  • Mark D. Baker

Abstract

One of the main goals of high energy heavy ion physics is to establish the existence of a deconfined phase of nuclear matter — the quark-gluon plasma — at high temperatures or densities. One possible signature of such a phase transition, especially if it were first order, would be a larger source size or lifetime than a similar hadronic system. At current AGS energies, we attempt to form a quark-gluon plasma by achieving a high baryon density for a period of time in the center of the collision regioni[1]. For a given density threshold, the size of this high density region should be a strong function of the impact parameter: the more central the event, the larger the high density region. Therefore, one possible signature of a quark-gluon plasma would be a sudden change in system lifetime or size as a function of the centrality of the collision.

Keywords

Source Size Dynamical Correlation High Density Region Pion Pair High Baryon Density 
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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References

  1. 1.
    S. Kahana et al., Searching for high baryon density at the AGS with ARC, Nucl. Phys. A566: 465c (1994).Google Scholar
  2. 2.
    U.A. Wiedemann, P. Scotto, and U. Heinz, Transverse momentum dependence of Hanbury- Brown-Twiss correlation radii, PREPRINT TPR-95–06 (1995).Google Scholar
  3. 3.
    T. Alber, Two-pion interferometry in central nucleus-nucleus collisions at the CERN SPS - results from experiments NA35 and NA49, Nucl. Phys. A590: 453c (1995).Google Scholar
  4. 4.
    B. Jacak, et al., Recent results from NA44 and a review of HBT, Nucl. Phys. A590: 215c (1995).Google Scholar
  5. 5.
    S. Chapman, R. Nix, U. Heinz, Extracting source parameters from gaussian fits to two particle correlations, Phys. Rev. C52: 2694 (1995).ADSGoogle Scholar
  6. 6.
    T. Abbott et al., NIM A 290 (1990) 41.ADSCrossRefGoogle Scholar
  7. 7.
    R.A. Soltz. “Two-pion Correlation Measurements for 14.6 A GeV/c Si+X and 11. 6 A GeV/c Au+Au” PhD thesis, MIT (1994).Google Scholar
  8. 8.
    B. Cole, et al., Recent results from experiment 859 at the BNL AGS, Nucl. Phys. A590: 179c (1995).Google Scholar
  9. 9.
    D. Zachary. PhD thesis, MIT (1994).Google Scholar
  10. 10.
    Fuqiang Wang. PhD thesis, Columbia U. (in preparation).Google Scholar
  11. 11.
    V. Cianciolo. “2 K+ Correlation Measurement” PhD thesis, MIT (1994).Google Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Mark D. Baker
    • 1
  1. 1.Massachusetts Institute of TechnologyCambridgeUSA

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