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Transverse-momentum p(t) correlations on (eta, phi) from mean-p(t) fluctuations in Au-Au collisions at root(s)(NN)=200 GeV

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    SYSNO ASEP0044896
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JOstatní články
    TitleTransverse-momentum p(t) correlations on (eta, phi) from mean-p(t) fluctuations in Au-Au collisions at root(s)(NN)=200 GeV
    TitleKorelace v příčné hybnosti (pT) v závislosti na (eta,phi) z fluktuací středního pT v Au+Au srážkách při težišťové energii 200 GeV na nukleonový pár
    Author(s) Adams, J. (US)
    Aggarwal, M. M. (IN)
    Bysterský, Michal (UJF-V)
    Chaloupka, Petr (UJF-V) RID
    Lednický, Richard (FZU-D) RID
    Šumbera, Michal (UJF-V) RID
    Zborovský, Imrich (UJF-V) RID, ORCID, SAI
    Source TitleJournal of Physics G-Nuclear and Particle Physics - ISSN 0954-3899
    Roč. 32, č. 6 (2006), L37-L48
    Number of pages12 s.
    Languageeng - English
    CountryGB - United Kingdom
    Keywordsscale dependence ; star ; autocorrelations ; equilibration
    Subject RIVBF - Elementary Particles and High Energy Physics
    R&D ProjectsGA202/04/0793 GA ČR - Czech Science Foundation (CSF)
    CEZAV0Z10480505 - UJF-V (2005-2011)
    AV0Z10100502 - FZU-D (2005-2011)
    AnnotationWe present first measurements of the pseudorapidity and azimuth (eta, phi) bin-size dependence of event-wise mean transverse-momentum < pt > fluctuations for Au-Au collisions at root sNN = 200 GeV. We invert that dependence to obtain p(t) autocorrelations on differences (eta(Delta), phi(Delta)) interpreted to represent velocity/temperature distributions on (eta, phi). The general form of the autocorrelations suggests that the basic correlation mechanism is parton fragmentation. The autocorrelations vary rapidly with collision centrality, which suggests that fragmentation is strongly modified by a dissipative medium in the more central Au-Au collisions relative to peripheral or p-p collisions.
    WorkplaceNuclear Physics Institute
    ContactMarkéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 ; Renata Glasová, glasova@ujf.cas.cz, Tel.: 266 177 223
    Year of Publishing2007
Number of the records: 1