Dynamics and Sizes of the Fireball at Freeze-out

Details Dynamics and Sizes of the Fireball at Freeze-out Dynamics and Sizes of the Fireball at Freeze-out

1999-07-19

arxiv.org/abs/nucl-th/9907075v1

Nucl.Phys.A663:753-756,2000

Physics

Nuclear Physics

Nuclear Theory

Contribution to the XVth Particle and Nuclei International Conference, PANIC'99, Uppsala June, 10-16, 1999; 4 pages, 2 figures

Scientific paper

10.1016/S0375-9474(99)00712-5

Analyzing the m_t-spectrum and two-particle correlations of negative hadrons from 158 AGeV/c Pb+Pb collisions at slightly forward rapidities we find a (thermal) freeze-out temperature of about 100 MeV and transverse flow with approximately 0.55c. The M_t-dependence of the correlation radii prefers a box-like transverse density profile over a Gaussian. From an analysis of the pion phase-space density we find pion chemical potential of approximately 60 MeV at thermal freeze-out.

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