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Multistrange baryon production in Au-Au collisions at root s(NN)= 130 GeV

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    0101880 - UJF-V 20043068 RIV US eng J - Journal Article
    Adams, J. - Adler, C. - Aggarwall, M. M. - Chaloupka, Petr - Filip, P. - Lednický, R. - Šumbera, Michal
    Multistrange baryon production in Au-Au collisions at root s(NN)= 130 GeV.
    [Produkce baryonů s vícenásobonou podivností ve srážkách Au-Au při root s(NN)= 130 GeV.]
    Physical Review Letters. Roč. 92, č. 18 (2004), s. 182301. ISSN 0031-9007. E-ISSN 1079-7114
    R&D Projects: GA ČR GA202/04/0793
    Institutional research plan: CEZ:AV0Z1048901
    Keywords : strangeness production * particle ratios * equilibration
    Subject RIV: BF - Elementary Particles and High Energy Physics
    Impact factor: 7.218, year: 2004

    The transverse mass spectra and midrapidity yields for Xis and Omegas are presented. For the 10% most central collisions, the (&UXi;) over bar (+)/h(-) ratio increases from the Super Proton Synchrotron to the Relativistic Heavy Ion Collider energies while the Xi(-)/h(-) stays approximately constant. A hydrodynamically inspired model fit to the Xi spectra, which assumes a thermalized source, seems to indicate that these multistrange particles experience a significant transverse flow effect, but are emitted when the system is hotter and the flow is smaller than values obtained from a combined fit to pi, K, p, and Lambdas.

    Jsou prezentována hmotová spektra a střední rapidity pro částice Xi a Omega. Fit inspirovaný hydrodynamickým modelem a předpokládající termální zdroj indikuje podstatný transverzální tok částic s vícenásobnou podivností ale nižší než pro částice s jednoduchou podivností.
    Permanent Link: http://hdl.handle.net/11104/0009265

     
     
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