Abstract
Results of a pion interferometry analysis are presented for the reactions S+C, S+S, S+Cu, S+Ag, S+Au and O+Au at 200 GeV per nucleon. Correlation functions were measured for pairs of negative pions in narrow windows of transverse momentum and rapidity, as a function of the three components of the momentum difference vector in cylindrical coordinates. The measured two-pion correlation functions suggest a space-time evolution of the system which proceeds in the following way for central nucleus-nucleus collisions. After interpenetration of the incident nuclei, the pion source expands in a boost invariant way along the collision axis. Estimates for the proper time interval between the onset of expansion and pion decoupling, as well as for the duration of pion emission are ∼ 4 fm/c and <2 fm/c, respectively. Thek T dependence observed forR S is consistent with the effect of resonance decays, alone or combined with slow transverse expansion. A linear dependence of the decoupling volume on the multiplicity is observed and indicates pion decoupling at a constant particle density. Presently available model predictions are briefly discussed
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References
S. Pratt, Phys. Rev. D33 (1986) 1314.
B. Andersson and W. Hofmann, Phys. Lett. B169 (1986) 364.
K. Kolehmainen and M. Gyulassy, Phys. Lett. B180 (1986) 203.
G. Bertsch, M. Gong, and M. Tohyama, Phys. Rev. C37 (1988) 1896.
Y. Hama and S. Padula, Phys. Rev. D37 (1988) 3237.
A. N. Makhlin and Yu. M. Sinyukov, Z. Phys. C39 (1988) 69.
Yu. M. Sinyukov, Nucl. Phys. A498 (1989) 151c
Yu. M. Sinyukov, Nucl. Phys. A566 (1994) 589c, Yu. M. Sinyukov, Lecture held at the NATO Advanced Research Workshop, Divonne, June 27-July 1, 1994, to appear in “Hot Hadronic Matter: Theory and Experiment”, Plenum, New York, 1994. Yu. M. Sinyukov, private communication, to be published.
T. Csörgö, LUNFD6/(NFFL-7081) 1994, T. Csörgö and B. Lörstad, LUNFD6/(NFFL-7082) 1994.
G. Bertsch, G. E. Brown, Phys. Rev. C40 (1989) 1830.
E. Schnedermann, J. Sollfrank and U. Heinz, Lectures held at the NATO Advanced Study Institute, 12.–24. July 1992, to appear in “Particle Production in Highly Excited Matter”, H. H. Gutbrod (ed.), Plenum, New York, 1992.
J. Sollfrank, M. Gaździcki, U. Heinz and J. Rafelski, Z. Phys. C61 (1994) 659.
G. Goldhaber, S. Goldhaber, W. Lee, A. Pais, Phys. Rev. 120 (1960) 300.
D. H. Boal, C. Gelbke, B. K. Jennings, Rev. Mod. Phys. 62 (1990) 553.
For recent reviews see Proc. International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 93), June 20–24, 1993, Borlänge, Sweden, Nucl. Phys. A566.
D. Ferenc et al., NA35 Collab., Nucl. Phys. A544 (1992) 531c.
P. Seyboth et al., NA35 Collab., Nucl. Phys. A544 (1992) 293c.
T. J. Humanic et al., Nucl. Phys. A566 (1994) 115c.
H. Beker et al., preprint CERN-PPE/94-119.
T. Peitzmann et al., Nucl. Phys. A566 (1994) 519c.
G. Roland, NA35 Collab., Nucl. Phys. A566 (1994) 527c.
A. Sandoval et al., Nucl. Phys. A461 (1987) 465c.
D. Röhrich et al., NA35 Collab., Nucl. Phys. A566 (1994) 35c.
Th. Alber et al., NA35 Collab., Z. Phys. C64 (1994) 195
D. Ferenc, Rudjer Bošković Institute Preprint IRB-FEP-13-92, Ph.D. Thesis
A. Kühmichel, Ph.D. Thesis, Frankfurt University, 1993.
G. Roland, Ph.D. Thesis, Frankfurt University, 1993.
M. Gyulassy, S. Kauffmann, L. W. Wilson, Phys. Rev. C20 (1979) 2267.
T. Csörgö and S. Pratt, Workshop on Relativistic Heavy Ion Physics, Central Research Institute Budapest, KFKI-1991-28/A, p. 75, and LUND preprint LU TP 91-10.
B. Andersson et al., Nucl. Phys. B281 (1987) 289.
R. Brun et al., GEANT3, CERN DD/EE/84-1 (1987).
J. G. Cramer, Phys. Rev. C43 (1991) 2798.
S. Pratt, Phys. Rev. D33 (1986) 72.
M. G. Bowler, Phys. Lett. B270 (1991) 69.
F. James, M. Roos, “Minuit Functional Minimization and Error Analysis”, CERN Program Library D506.
W. T. Eadie, D. Drijard, F. E. James, M. Roos, B. Sadoulet, “Statistical Methods in Experimental Physics”, North-Holland, Amsterdam, 1971.
S. Pratt, T. Csörgö and J. Zimanyi, Phys. Rev. C42 (1990) 2646.
H. Sorge, H. Stöcker, W. Greiner, Nucl. Phys. A498 (1989) 567.
B.R. Schlei, U. Ornik, M. Plümer and R.M. Weiner, Phys. Lett. B293 (1992) 275.
J. Bolz, U. Ornik, M. Plümer, B.R. Schlei and R.M. Weiner, Phys. Lett. B300 (1993) 404
T.J. Humanic et al., Z. Phys. C38 (1988) 79. A. Bamberger et al., Phys. Lett. B203 (1988) 320.
J. Harris et al., Nucl. Phys. A498 (1989) 133c.
Th. Alber et al., NA35 Collab., submitted to Phys. Rev. Lett.
U. Ornik, private communication, to be published.
M. Kataja, J. Letessier, P. V. Ruuskanen, A. Tounsi, Z. Phys. C55 (1992) 153.
J.D. Bjorken, Phys. Rev. D27 (1983) 140.
G.I. Kopylov and M.I. Podgorecki, Sov. J. Nucl. Phys. 15 (1972) 219.
U. Mayer, E. Schnedermann and U. Heinz, Phys. Lett. B294 (1992) 69.
R. Stock, Annalen der Physik 48 (1991) 195.
U. Heinz, P. Koch and B. Friman, “General Conditions in Heavy Ion Collisions at the LHC”, Proc. Large Hadron Collider Workshop, 4–9 October 1990, Aachen, Germany, Vol. II, p. 1079.
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NA35 Collaboration., Alber, T., Bächler, J. et al. Two-pion Bose-Einstein correlations in nuclear collisions at 200 GeV per nucleon. Z. Phys. C - Particles and Fields 66, 77–88 (1995). https://doi.org/10.1007/BF01496582
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DOI: https://doi.org/10.1007/BF01496582