Large $p_t$ enhancement from freeze out

2; 2); 3); Brazil); Brazil; (5) University of Rio de Janeiro; Budapest; Cs. Anderlik (1; F. Grassi (4); Germany; (3) - KFKI Research Institute for Particle; H. St\"ocker (2) ((1) - University of Bergen

arxiv: nucl-th/9905054 · v1 · submitted 1999-05-26 · ⚛️ nucl-th

Large p_t enhancement from freeze out

V.K. Magas (1) , Cs. Anderlik (1 , 2) , L.P. Csernai (1 , 2 , 3) , F. Grassi (4) , W. Greiner (2)

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Y. Hama (4) T. Kodama (5) Zs. L\'az\'ar (1 H. St\"ocker (2) ((1) - University of Bergen Norway; (2) - University of Frankfurt Germany; (3) - KFKI Research Institute for Particle Nuclear Physics Budapest Hungary; (4) University of Sao Paulo Brazil; (5) University of Rio de Janeiro Brazil)

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keywords freezedistributionmomentumparticlesacrossagreementdimensionaldiscussed

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Freeze out of particles across three dimensional space-time hypersurface is discussed in a simple kinetic model. The final momentum distribution of emitted particles, for freeze out surfaces with space-like normal, shows a non-exponential transverse momentum spectrum. The slope parameter of the $p_t$ distribution increases with increasing $p_t$, in agreement with recently measured SPS pion and $h^-$ spectra.

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Large p_t enhancement from freeze out

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