Large $p_t$ enhancement from freeze out

Abstract

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.

8 pages, 1 figure. Accepted for publication in Physics Letters B

References in corpus (1)

• Shock-like Freeze-out in Relativistic Hydrodynamics

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