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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 ASEP 0044896 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Transverse-momentum p(t) correlations on (eta, phi) from mean-p(t) fluctuations in Au-Au collisions at root(s)(NN)=200 GeV Title Korelace 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, ORCID
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Zborovský, Imrich (UJF-V) RID, ORCID, SAISource Title Journal of Physics G-Nuclear and Particle Physics. - : Institute of Physics Publishing - ISSN 0954-3899
Roč. 32, č. 6 (2006), L37-L48Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords scale dependence ; star ; autocorrelations ; equilibration Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects GA202/04/0793 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10480505 - UJF-V (2005-2011) AV0Z10100502 - FZU-D (2005-2011) Annotation We 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. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2007
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