arXiv:nucl-th/9905054·v1·Nuclear Theory
Large enhancement from freeze out
V.K. Magas (1)🇳🇴 · Cs. Anderlik (1, 2)🇳🇴 · L.P. Csernai (1, 2, 3)🇳🇴 · F. Grassi (4)🇧🇷 · W. Greiner (2)🇩🇪 · Y. Hama (4)🇧🇷 · T. Kodama (5)🇧🇷 · Zs. Lázár (1, 2)🇳🇴 · H. Stöcker (2) ((1) - University of Bergen, Norway; (2) - University of Frankfurt, Germany; (3) - KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary; (4) University of Sao Paulo, Brazil; (5) University of Rio de Janeiro, Brazil)🇩🇪
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 distribution increases with increasing , in agreement with recently measured SPS pion and spectra.
Comments: 8 pages, 1 figure. Accepted for publication in Physics Letters B