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Träfflista för sökning "WAKA:ref ;pers:(Gustafsson Hans Åke);pers:(He X.);pers:(Matathias F.);srt2:(2005-2009)"

Sökning: WAKA:ref > Gustafsson Hans Åke > He X. > Matathias F. > (2005-2009)

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51.
  • Afanasiev, S., et al. (författare)
  • Source breakup dynamics in Au+Au collisions at root s(NN)=200 GeV via three-dimensional two-pion source imaging
  • 2008
  • Ingår i: Physical Review Letters. - 1079-7114. ; 100:23
  • Tidskriftsartikel (refereegranskat)abstract
    • A three-dimensional correlation function obtained from midrapidity, low p(T), pion pairs in central Au+Au collisions at root s(NN) = 200 GeV is studied. The extracted model-independent source function indicates a long range tail in the directions of the pion pair transverse momentum (out) and the beam (long). A proper breakup time tau(0) similar to 9 fm/c and a mean proper emission duration Delta tau similar to 2 fm/c, leading to sizable emission time differences ( approximate to 12 fm/c), are required to allow models to be successfully matched to these tails. The model comparisons also suggest an outside-in "burning" of the emission source reminiscent of many hydrodynamical models.
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52.
  • Afanasiev, S., et al. (författare)
  • Systematic studies of elliptic flow measurements in Au plus Au collisions at s(NN)=200 GeV
  • 2009
  • Ingår i: Physical Review C (Nuclear Physics). - 0556-2813. ; 80:2
  • Tidskriftsartikel (refereegranskat)abstract
    • We present inclusive charged hadron elliptic flow (v(2)) measured over the pseudorapidity range vertical bar eta vertical bar < 0.35 in Au+Au collisions at s(NN)=200 GeV. Results for v(2) are presented over a broad range of transverse momentum (p(T)=0.2-8.0 GeV/c) and centrality (0-60%). To study nonflow effects that are correlations other than collective flow, as well as the fluctuations of v(2), we compare two different analysis methods: (1) the event-plane method from two independent subdetectors at forward (vertical bar eta vertical bar=3.1-3.9) and beam (vertical bar eta vertical bar>6.5) pseudorapidities and (2) the two-particle cumulant method extracted using correlations between particles detected at midrapidity. The two event-plane results are consistent within systematic uncertainties over the measured p(T) and in centrality 0-40%. There is at most a 20% difference in the v(2) between the two event-plane methods in peripheral (40-60%) collisions. The comparisons between the two-particle cumulant results and the standard event-plane measurements are discussed.
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  • Resultat 51-52 av 52
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Gustafsson, Hans... (52)Ta bort avgränsningen
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