Download Advances in Nuclear Dynamics 4 by A. Badal`, R. Barbera, A. Bonasera, M. Gulino, A. Palmeri PDF

By A. Badal`, R. Barbera, A. Bonasera, M. Gulino, A. Palmeri (auth.), Wolfgang Bauer, Hans-Georg Ritter (eds.)

This quantity is the court cases of the 14th iciness Workshop on Nuclear Dynamics, held in 1998. The publication covers a wide range in strength of nuclear collision with specific emphasis on nuclear multifragmentation and nuclear collisions at AGS and CERN energies. Many specialists within the box have made first-class contributions.

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Cuts on NIMF were done and are shown in the right panels of Fig. 2. Here, as in the experiment, we notice a fast and simultaneous saturation of N n, NLCp and EfcP. However, the fragmentation process is, by the nature of the model, of statistical origin. Inspection of the figure reveals that saturation occurs around N 1MF =4, which corresponds to the maximum average number, (N1MF)max' In the model, the average value of NIMF increases with E* until (N1MF)max is reached at E;"ax' Therefore, NIMF is, on average, a rough measure of excitation energy for NIMF < (N1MF)max' For values of NIMF > (N1MF)max' there is no increase of E*.

Rev. C 44,2095 (1991). See also the chapter by Barbera et al. in this volume. C. Song, V. Koch, S. H. Lee, and C. M. Ko, Phys. Lett. B366, 379 (1996). R. Rapp, G Chanfray, and J. Wambach, Phys. Rev. Lett. 76, 368 (1996). J. Kapusta, D. Kharzeev, and L. McLerran, Phys. Rev. D 53, 5034 (1996). A. Drees, Phys. Lett. B388, 380 (1996). K. 1. Haglin, Phys. Rev. C 53 R2606 (1996). For first suggestions and preliminary results of the importance of this mechanisms, see, K. Haglin, proceedings of INT/RHIC Workshop Electromagnetic Probes of Quark Gluon Plasma, January 31 17.

Oto: * 100 200 50 100 o total decay string p w - sources 7r Figure 7. Pion sources in central Pb+Pb collisions at CERN energies: 80% of the final pions stem from resonance decays and 20% from direct production via string fragmentation. Decay-pions predominantly are emitted from the p and w mesons and the ~1232 resonance. freeze-out time distributions 19 , all meson species here show surprisingly similar freezeout behavior - the freeze-out time distributions all closely resemble each other. Only the hyperons show an entirely different freeze-out behavior.

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