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Title Resonances from a hadronic fireball Author info Evgeni E. Kolomeitsev, Peter Filip Author Kolomeitsev Evgeni E. 1970- (50%) UMBFP06 - Katedra fyziky
Co-authors Filip Peter (50%)
Source document Journal of Physics G: Nuclear and Particle Physics. Vol. 28, no. 7 (2002), pp. 1697-1705. - Bristol : IOP Publishing, 2002 Keywords jadrová fyzika heavy ion collisions Phi-mesons particles Language English Country Great Britian systematics 539.1 Annotation The production of phi(1020), Lambda*(1520) and (K*) over bar (892) resonances at the final stage of a heavy-ion collision is considered. It is shown that original momentum distributions and abundance of resonances formed during the process of heavy-ion collisions may differ significantly from their measured spectra and yields. The reconstruction probability of resonances decaying inside the fireball can be strongly suppressed because of interactions of their hadronic decay products in the fireball medium. We investigate the dependence of the degree of suppression on the fireball size, dynamics and the resonance decay width in the medium. Quantitative results are presented for lead-lead collisions at 158 GeV SPS beam energy. Public work category ADC No. of Archival Copy 26394 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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Title Phi mesons from a hadronic fireball Author info Peter Filip, Evgeni E. Kolomeitsev Author Filip Peter (50%)
Co-authors Kolomeitsev Evgeni E. 1970- (50%) UMBFP06 - Katedra fyziky
Source document Physical Review C. Vol. 64, no. 5 (2001), pp. 4905-4905. - Maryland : American Physical Society, 2001 Keywords heavy ion collisions nuclear matter dense matter Language English Country United States of America systematics 539.1 Annotation Production of phi mesons is considered in the course of heavy-ion collisions at SPS energies. We investigate the possible difference in momentum distributions of phi mesons measured via their leptonic (mu (+),mu (-)) 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 the phi yield observed in the hadronic channel. We analyze how the in-medium modifications of meson properties affect apparent, reconstructed momentum distributions of phi mesons. Quantitative results are presented for central Pb+Pb collisions at E-beam = 158 GeV/nucleon. Public work category ADC No. of Archival Copy 26396 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika unrecognised