Phi Mesons from a Hadronic Fireball
Peter Filip, Evgeni E. Kolomeitsev
Abstract
Production of ϕ mesons is considered in the course of heavy-ion collisions at SPS energies. We investigate the possible difference in momentum distributions of ϕ mesons measured via their leptonic (μ+μ-) and hadronic (K+K-) decays. Rescattering of secondary kaons in the dense hadron gas together with the influence of in-medium kaon potential can lead to a relative decrease of a ϕ yield observed in the hadronic channel. We analyze how the in-medium modifications of meson properties affect apparent - reconstructed momentum distributions of ϕ mesons. Quantitative results are presented for central Pb+Pb collisions at Ebeam=158 GeV/A.
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