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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.27 no.S1 (2000), pp. 153-156
Analyses of Transverse Momentum Spectra in Central C+C and C+Ta Interactions at 4.2 AGeV /c Beam Momentum within a Cylindrical Collective Flow Model
S. Backović1, I. Pićurić1, D. Salihagić1, D. Krpić2
1Faculty of Natural Sciences and Mathematica University of Montenegro, 81001 Podgorica, P.O. Box 211, Montenegro, Yugoslavia
2Faculty of Physics University of Belgrade, 11001 Belgrade, P.O. Box 368, Serbia, Yugoslavia
go back1Faculty of Natural Sciences and Mathematica University of Montenegro, 81001 Podgorica, P.O. Box 211, Montenegro, Yugoslavia
2Faculty of Physics University of Belgrade, 11001 Belgrade, P.O. Box 368, Serbia, Yugoslavia
Abstract. The transverse momentum spectra of secondary π- mesons and participant protons in central C+C and C+Ta interactions at 4.2 AGeV/c beam momentum have been analyzed within a cylindrical collective flow model. All the particle spectra at a given beam energy can be reproduced with a single set of intensive parameters for the initial state of fireball. As typical freeze-out parameters in this beam energy region we find a freeze-out temperature T = (55-100) MeV, and an average transverse expansion velocity at freeze-out (β) = 0.30-0.39.