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Kinetic freeze out

V. K. Magas, Cs. Anderlik, L. P. Csernai, F. Grassi, W. Greiner, Y. Hama, T. Kodama, Zs. I. Lázár, H. Stöcker

nucl-tharXiv:nucl-th/9903045

Abstract

Freeze out of particles across a space-time hypersurface is discussed in kinetic models. The calculation of final momentum distribution of emitted particles is described for freeze out surfaces, with spacelike normals. The resulting non-equilibrium distribution does not resemble, the previously proposed, cut Juttner distribution, and shows non-exponential pt-spectra similar to the ones observed in experiments.

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