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Träfflista för sökning "WFRF:(Silvermyr D.) ;pers:(Bathe S.);pers:(Denisov A.);srt2:(2007);pers:(Constantin P.);pers:(Hamagaki H.);pers:(Aphecetche L.)"

Sökning: WFRF:(Silvermyr D.) > Bathe S. > Denisov A. > (2007) > Constantin P. > Hamagaki H. > Aphecetche L.

  • Resultat 11-14 av 14
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11.
  • Afanasiev, S., et al. (författare)
  • Elliptic flow for phi mesons and (Anti)deuterons in Au+Au collisions at root s(NN)=200 GeV
  • 2007
  • Ingår i: Physical Review Letters. - 1079-7114. ; 99:5
  • Tidskriftsartikel (refereegranskat)abstract
    • Differential elliptic flow (v(2)) for phi mesons and (anti)deuterons ((d) over bar )d is measured for Au + Au collisions at root s(NN) = 200 GeV. The v(2) for phi mesons follows the trend of lighter pi(+/-) and K-+/- mesons, suggesting that ordinary hadrons interacting with standard hadronic cross sections are not the primary driver for elliptic flow development. The v(2) values for ((d) over bar )d suggest that elliptic flow is additive for composite particles. This further validation of the universal scaling of v(2) per constituent quark for baryons and mesons suggests that partonic collectivity dominates the transverse expansion dynamics.
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12.
  • Adler, S. S., et al. (författare)
  • Centrality dependence of pi(0) and eta production at large transverse momentum in root s(NN) = 200 GeV d+Au collisions
  • 2007
  • Ingår i: Physical Review Letters. - 1079-7114. ; 98:17
  • Tidskriftsartikel (refereegranskat)abstract
    • The dependence of transverse momentum spectra of neutral pions and eta mesons with p(T) < 16 GeV/c and p(T) < 12 GeV/c, respectively, on the centrality of the collision has been measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) in d + Au collisions at root s(NN) = 200 GeV. The measured yields are compared to those in p + p collisions at the same root s(NN) scaled by the number of underlying nucleon-nucleon collisions in d + Au. At all centralities, the yield ratios show no suppression, in contrast to the strong suppression seen for central An + Au collisions at RHIC. Only a weak p(T) and centrality dependence can be observed.
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13.
  • Adler, S. S., et al. (författare)
  • Measurement of direct photon production in p+p collisions at root s=200 GeV
  • 2007
  • Ingår i: Physical Review Letters. - 1079-7114. ; 98:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Cross sections for midrapidity production of direct photons in p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are reported for transverse momenta of 3 < p(T)< 16 GeV/c. Next-to-leading order perturbative QCD (pQCD) describes the data well for p(T)> 5 GeV/c, where the uncertainties of the measurement and theory are comparable. We also report on the effect of requiring the photons to be isolated from parton jet energy. The observed fraction of isolated photons is well described by pQCD for p(T)> 7 GeV/c.
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14.
  • Adler, S. S., et al. (författare)
  • Production of omega mesons at large transverse momenta in p+p and d+Au collisions at root S(NN) = 200 GeV
  • 2007
  • Ingår i: Physical Review C (Nuclear Physics). - 0556-2813. ; 75:5
  • Tidskriftsartikel (refereegranskat)abstract
    • The PHENIX experiment at RHIC has measured the invariant cross section for omega-meson production at midrapidity in the transverse momentum range 2.5 < p(T)< 9.25 GeV/c in p+p and d+Au collisions at root s(NN) = 200 GeV. Measurements in two decay channels (omega ->pi(0)pi(+)pi(-) and omega ->pi(0)gamma) yield consistent results, and the reconstructed omega mass agrees with the accepted value within the p(T) range of the measurements. The omega/pi(0) ratio is found to be 0.85 +/- 0.05(stat)+/- 0.09(sys) in p+p and 0.94 +/- 0.08(stat)+/- 0.12(sys) in d+Au collisions, independent of p(T). The nuclear modification factor R-dA(omega) is 1.03 +/- 0.12(stat)+/- 0.21(sys) and 0.83 +/- 0.21(stat)+/- 0.17(sys) in minimum bias and central (0-20%) d+Au collisions, respectively.
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  • Resultat 11-14 av 14
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tidskriftsartikel (13)
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Gustafsson, Hans-Åke (14)
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Kwon, Y. (14)
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Nagle, J. L. (14)
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