Azimuthal Correlations of Transverse Energy for Pb on Pb at 158 GeV/Nucleon

  • Thomas Wienold
  • Isaac Huang


Azimuthal correlations have been studied in heavy ion reactions over a wide range of beam energies. At low incident energies up to 100 MeV/nucleon where collective effects like the directed sidewards flow are generally small, azimuthal correlations provide a useful tool to determine the reaction plane event by event [1]. In the energy regime of the BEVALAC (up to 1 GeV/nucleon for heavy ions) particular emission patterns, i.e. azimuthal correlations of nucleons and light nuclei with respect to the reaction plane, have been associated with the so called squeeze out [2] and sidesplash [3] effects. These effects are of particular interest because of their sensitivity to the equation of state at the high baryon density which is build up during the collision process [4]. Angular distributions similar to the squeeze out have been observed for pions at the SIS in Darmstadt [5, 6] as well as from the EOS — collaboration [7]. Recently also the sideward flow was measured for pions and kaons [7, 8]. However, the origin of the signal in the case of produced mesons is thought to be of a different nature than that for the nucleon flow [9, 10].


Transverse Energy Collective Effect Time Projection Chamber Tensor Analysis Azimuthal Correlation 
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  1. 1.
    W.K. Wilson, R. Lacey, C.A. Ogilvie and G.D. Westfall, Phys. Rev. C45 (1992) 738.ADSGoogle Scholar
  2. 2.
    H.H. Gutbrod, K.H. Kampert, B.W. Kolb, A.M. Poskanzer, H.G. Ritter and H.R. Schmidt, Phys. Lett. B216 (1989) 267Google Scholar
  3. 3.
    K.G.R. Doss, H.A. Gustafsson, H.H. Gutbrod, K.H. Kampert, B. Kolb, H. Löhner, B. Ludewigt, A.M. Poskanzer, H.G. Ritter, H.R. Schmidt and H. Wieman, Phys. Rev. Lett. 57 (1986) 302ADSCrossRefGoogle Scholar
  4. 4.
    H. Stöcker and W. Greiner, Phys. Rep. 137 (1986) 277ADSCrossRefGoogle Scholar
  5. 5.
    D. Brill et al. (KaoS Collab.), Phys. Rev. Lett. 71 (1993) 336ADSCrossRefGoogle Scholar
  6. 6.
    Venema et al. (Taps Collab.), Phys. Rev. Lett. 71 (1993) 835Google Scholar
  7. 7.
    D. Cebra ei al. (EOS Collab.), these proceedingsGoogle Scholar
  8. 8.
    D. Best et al. (FOPI Collab.), these proceedingsGoogle Scholar
  9. 9.
    B.A. Li et al., Phys. Rev. C44 (1991) 2095Google Scholar
  10. 10.
    S.A. Bass et al., Phys. Lett. B302 (1993) 381Google Scholar
  11. 11.
    J. Barrette et al. (E877 Collab.), Phys. Rev. Lett. 73 (1994) 2532Google Scholar
  12. 12.
    S. Margetis et al. (NA49 Collab.), Nucl. Phys. A590 (1995) 355cADSGoogle Scholar
  13. 13.
    I. Huang, S. Margetis, P. Seyboth, and D. Vranic, LBL report 36877 (1995)Google Scholar
  14. 14.
    J. Bächler et al. (NA35 Collab.), Z. Phys. C52 (1991) 239Google Scholar
  15. 15.
    T. Alber et al. (NA49 Collab.), Phys. Rev. Lett. 75 (1995) 3814ADSCrossRefGoogle Scholar
  16. 16.
    J.D. Bjorken, Phys. Rev. D27 (1983) 140ADSCrossRefGoogle Scholar
  17. 17.
    J.-Y. 011itault, Phys. Rev. D48 (1993) 1132Google Scholar
  18. 18.
    K. Werner, Phys. Lett. B208 (1988) 520Google Scholar
  19. 19.
    H. Sorge et al., Ann. Phys. 192 (1989) 266ADSzbMATHCrossRefGoogle Scholar
  20. 20.
    H.H. Gutbrod et al., Phys. Rev. C42 (1990) 640ADSGoogle Scholar
  21. 21.
    Y. Zhang and J. Wessels (E877 Collab.), Nucl. Phys. A590 (1995) 557cGoogle Scholar
  22. 22.
    H.R. Schmidt et al. (WA80 Collab.), Nucl. Phys. A544 (1992) 449cGoogle Scholar
  23. 23.
    T.C. Awes et al. (WA80 Collab.), LANL preprint number hep-ex/9601007Google Scholar
  24. 24.
    V.P. Viyogi et al. (WA93 Collab.), Nucl. Phys. A590 (1995) 503cGoogle Scholar
  25. 25.
    P. Filip, preprint (CU/PH1/96) and private communicationGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Thomas Wienold
    • 1
  • Isaac Huang
    • 2
  1. 1.Lawrence Berkeley LaboratoryUniversity of CaliforniaBerkeleyUSA
  2. 2.University of California at DacisDavisUSA

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