2000/02/07 by D. Yu. Peressounko, Peressounko, D. Yu., Yu. E. Pokrovsky +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0002068
6 pages, 2 figures, submitted to Phys. Lett. B
arxiv created 2000/02/08 · arxiv updated 2009/11/30
On the basis of hydrodynamic model of evolution we consider emission of lightest (π,K,η,ρ,ω,K^*) mesons directly from the surface of quark-gluon plasma, created in the heavy ion collision, with accounting of their absorption by surrounding hadronic gas. We evaluate upper and lower limits on yields of these direct mesons in Pb+Pb collisions at SpS, RHIC and LHC energies, and find, that even in the case of the lowest yield, direct K, ηand heavier mesons dominate over freeze-out ones at soft pt (pt < 0.5 GeV/c). This leads to enhancement of the low pt production of these mesons which hardly can be explained within pure hadronic gas scenario, and can be considered as quark-gluon plasma signature.