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Multiplicity dependence of z scaling for identified hadrons

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    0306875 - ÚJF 2008 RIV RU eng J - Journal Article
    Tokarev, M. V. - Zborovský, Imrich
    Multiplicity dependence of z scaling for identified hadrons.
    [Závislost multiciplity identifikovaných hadronů a z -škálování.]
    Physics of Atomic Nuclei. Roč. 70, č. 7 (2007), s. 1294-1304. ISSN 1063-7788. E-ISSN 1562-692X
    R&D Projects: GA MŠMT 1P04LA213; GA ČR GA202/04/0793
    Institutional research plan: CEZ:AV0Z10480505
    Keywords : transverse -momentum spectra * centrally produced hadrons * high-energies
    Subject RIV: BE - Theoretical Physics
    Impact factor: 0.515, year: 2007

    The multiplicity dependence of inclusive spectra of identified hadrons (pi, K, p, K-S(0), and Lambda) produced in high-energy pp and pp collisions is StUdied. Analysis of experimental data on high-PT hadron cross sections obtained at the Tevatron and RHIC is performed in the framework of z scaling. Independence of the scaling function psi(z) on the multiplicity density dN(ch)/d(eta) is established. The multiplicity density measured in nucleon-nucleon collisions reaches much higher values than the corresponding quantity [1/(0.5N(p))]dN(ch)/d eta obtained in heavy-ion collisions. Its influence on particle production reveals properties of self-similarity and fractality. The relation between the scaling variable z and thermodynamic quantities ("heat capacity" and "temperature") of the medium associated with the produced inclusive particle is discussed. Search for z-scaling violation in pp and pp collisions at very high multiplicities as an indication of new-physics phenomena is suggested.

    Je studována multiplicita inklusivních spekter identifikovaných hadronů (pí,K,p,K-S(0)Lambada ve vysokoenergetických srážkách pp.Jsou hydrolyzována data s velkými příčnými hybnostmi získané na Tevatronu a RHIC pomocí z-škálování.
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