Advertisement

Comparing particle emission scenarios in hydrodynamics: Continuous emission vs. freeze-out

  • F. Grassi
  • Y. Hama
  • T. Kodama
  • O. Socolowski
Article

Abstract

The usual particle emission scenario used in hydrodynamics presupposes that particles instantaneously stop interacting (freeze-out) once they reach some three dimensional surface. Another formalism has been developed recently where particle emission occurs continuously during the whole expansion of thermalized matter. Here we compare both mechanisms in a simplified hydrodynamical framework and show that they lead to a drastically different interpretation of data.

Keywords

Heavy Particle Particle Emission Continuous Emission Transverse Expansion Pion Spectrum 
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.

References

  1. 1.
    H. Satz,Nucl. Phys. A525 (1991) 1c.Google Scholar
  2. 2.
    F. Cooper and G. Frye,Phys. Rev. D10 (1974) 186.ADSGoogle Scholar
  3. 3.
    F. Grassi, Y. Hama and T. Kodama,Phys. Lett. B355 (1995) 9;Z. Phys. C73 (1996) 153.Google Scholar
  4. 4.
    J.D. Bjorken,Phys. Rev. D27 (1983) 140.ADSCrossRefGoogle Scholar
  5. 5.
    P.V. Ruuskanen,Acta Phys. Polonica B18 (1987) 551.Google Scholar
  6. 6.
    T. Åkesson et al. (NA34),Z. Phys. C46 (1990) 365; A. Bamberger et al. (NA35),Z. Phys. C38 (1988) 89;Nucl. Phys. A498 (1989) 133c; Y. Takahashi et al. (EMU05),Nucl. Phys. A525 (1991) 591c.Google Scholar
  7. 7.
    A. Bamberger et al. (NA35),Z. Phys. C43 (1989) 25; ibid.48 (1990) 191; E. Andersen et al. (NA36),Phys. Lett. B294 (1992) 127; S. Abatzis et al. (WA85),Phys. Lett. B270 (1991) 123.Google Scholar
  8. 8.
    K.S. Lee, U. Heinz and E. Schnerdermann,Z. Phys. C48 (1990) 525.Google Scholar
  9. 9.
    U. Ornik and R.M. Weiner,Phys. Lett. B263 (1991) 503.Google Scholar
  10. 10.
    N.J. Davidson et al.,Phys. Lett. B255 (1991) 105.Google Scholar
  11. 11.
    N.J. Davidson et al.,Phys. Lett. B256 (1991) 554.Google Scholar
  12. 12.
    D.W. von Oertzen et al.,Phys. Lett. B274 (1992) 128.Google Scholar
  13. 13.
    N.J. Davidson et al.,Z. Phys. C56 (1992) 319.Google Scholar
  14. 14.
    J. Cleymans and H. Satz,Z. Phys. C57 (1993) 135.Google Scholar
  15. 15.
    S. Abatzis et al.,Nucl. Phys. A566 (1994) 225c.CrossRefADSGoogle Scholar
  16. 16.
    J. Bartke et al.,Z. Phys. C48 (1990) 191.Google Scholar
  17. 17.
    J. Letessier, A. Tounsi and J. Rafelski,Phys. Lett. B292 (1992) 417.Google Scholar
  18. 18.
    J. Sollfrank et al.,Z. Phys. C61 (1994) 659.Google Scholar
  19. 19.
    To be published, quoted in [20]. and [21] J. Letessier et al.,Phys. Rev. Dd51 (1995) 3408.CrossRefADSGoogle Scholar
  20. 20.
    J. Letessier et al.,Phys. Rev. Lett. 70 (1993) 3530.CrossRefADSGoogle Scholar
  21. 21.
    J. Letessier et al.,Phys. Rev. D51 (1995) 3408.ADSGoogle Scholar
  22. 22.
    F. Grassi and O. Socolowski Jr., submitted.Google Scholar
  23. 23.
    K. Redlich et al.,Nucl. Phys. A566 (1994) 391c.CrossRefADSGoogle Scholar
  24. 24.
    S. Abatzis et al.,Phys. Lett. B244 (1990) 130; ibid.B259 (1991) 508; ibid.B270 (1991) 123.Google Scholar
  25. 25.
    J. Rafelski,Phys. Lett. B262 (1991) 333.Google Scholar
  26. 26.
    J. Cleymans et al.,Z. Phys. C33 (1986) 151.Google Scholar
  27. 27.
    J. Cleymans et al.,Phys. Lett. B242 (1990) 111.Google Scholar
  28. 28.
    J. Cleymans et al.,Z. Phys. C55 (1992) 317.Google Scholar
  29. 29.
    D.H. Rischke at al.,Z. Phys. C51 (1991) 485.Google Scholar
  30. 30.
    J. Cleymans et al.,Phys. Sc. 48 (1993) 277.CrossRefADSGoogle Scholar
  31. 31.
    D.P. Menezes et al.,Phys. Rev. C47 (1993) 2635.CrossRefADSGoogle Scholar
  32. 32.
    S. Abatzis et al.,Phys. Lett. B316 (1993) 615; ibid.347 (1995) 158; ibid.376 (1996) 251; ibid.355 (1995) 401.Google Scholar
  33. 33.
    S. Abatzis et al.,Phys. Lett. B354 (1995) 178.Google Scholar
  34. 34.
    L.V. Bravinha et al.,Phys. Lett. B354 (1995) 196.Google Scholar
  35. 35.
    H. Sorge,Phys. Lett. B373 (1996) 16.Google Scholar
  36. 36.
    N. Bilić et al.,Phys. Lett. B311 (1993) 266.Google Scholar
  37. 37.
    N. Bilić et al.,Z. Phys. C63 (1994) 525.Google Scholar
  38. 38.
    T. Csörgő and L.P. Csernai,Phys. Lett. B333 (1994) 494.Google Scholar

Copyright information

© Akadémiai Kiadó 1997

Authors and Affiliations

  • F. Grassi
    • 1
    • 2
  • Y. Hama
    • 2
  • T. Kodama
    • 3
  • O. Socolowski
    • 4
  1. 1.Instituto de Física-UnicampCampinasBrazil
  2. 2.Instituto de Física-USPSão PauloBrazil
  3. 3.Instituto de Física-UFRJRio de JaneiroBrazil
  4. 4.Instituto de Física Teórica-UNESPSão PauloBrazil

Personalised recommendations