Particle Correlations In Fixed Target Pb Pb Collisions At 158 Gev C Per Nucleon
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Author | : Hanspeter Naef |
Publisher | : |
Total Pages | : 202 |
Release | : 1997 |
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L'originalité de WA98 vient de sa grande variété de signaux mesurés; une étude sur leurs corrélations est également présentées.
Author | : Dariusz Antończyk |
Publisher | : |
Total Pages | : 171 |
Release | : 2006 |
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Author | : C. AMSLER |
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Total Pages | : 0 |
Release | : 2002 |
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Author | : Isaac Huang |
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Total Pages | : 420 |
Release | : 1997 |
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Author | : Glenn Elliot Cooper |
Publisher | : |
Total Pages | : 356 |
Release | : 2000 |
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Author | : Thongbay Vongpaseuth |
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Total Pages | : 392 |
Release | : 1999 |
Genre | : Gold ions |
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Author | : Jason Warren Dunn |
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Total Pages | : 440 |
Release | : 1997 |
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Total Pages | : 14 |
Release | : 1998 |
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Single-particle spectra and two-particle correlation functions measured by the NA49 collaboration in central Pb+Pb collisions at 158 GeV/nucleon are presented. These measurements are used to study the kinetic and chemical freeze-out conditions in heavy ion collisions. We conclude that large baryon stopping, high baryon density and strong transverse radial flow are achieved in central Pb+Pb collisions at the SPS.
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Total Pages | : |
Release | : 2002 |
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In this thesis, a centrality dependent study of tow-particle momentum correlations of like-sign pions (HBT interferometry) from Pb-Au collisions at beam energies of 40, 80 and 158 AGeV is presented. The three-dimensional correlation function C_2, depending on the relative momentum components of the particle pair, was parameterized using a three-dimensional Gaussian, modified to consider the final state Coulomb repulsion. The parameterization was done in the Cartesian out-side-long system as proposed by G. Bertsch and S. Pratt. A differential analysis of the HBT radius parameters as a function of the mean transverse pair momentum k_perp allowed to determine transverse geometrical source sizes of about 5.5 fm to 7 fm, increasing with energy and centrality. The mean transverse flow velocity v_perp was found to be of the order 0.5--0.6 c. For the freeze-out time tau_f values between 6 and 8 fm/c were obtained with a duration of particle emission compatible with zero. The beam energy dependence of the HBT radii provide evidence for a universal pion freeze-out condition. The analyzed data have been recorded with the CERES spectrometer at the Super Proton Synchrotron (SPS) accelerator at CERN.
Author | : Franziskus Stoffel |
Publisher | : |
Total Pages | : 110 |
Release | : 1997 |
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