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Two-particle correlations on transverse momentum and momentum dissipation in Au-Au collisions at √sNN = 130 GeV (CROSBI ID 216874)

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(STAR Collaboration) Adams, J. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Zuo, J.X. Two-particle correlations on transverse momentum and momentum dissipation in Au-Au collisions at √sNN = 130 GeV // Journal of physics. G, Nuclear and particle physics, 34 (2007), 5; 799-810. doi: 10.1088/0954-3899/34/5/002

Podaci o odgovornosti

Adams, J. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Zuo, J.X.

STAR Collaboration

engleski

Two-particle correlations on transverse momentum and momentum dissipation in Au-Au collisions at √sNN = 130 GeV

Measurements of two-particle correlations on transverse momentum pt for Au–Au collisions at √sNN = 130 GeV are presented. Significant large-momentum- scale correlations are observed for charged primary hadrons with 0.15 ≤ pt ≤ 2 GeV/c and pseudorapidity |η| ≤ 1.3. Such correlations were not observed in a similar study at lower energy and are not predicted by theoretical collision models. Their direct relation to mean-pt fluctuations measured in the same angular acceptance is demonstrated. Positive correlations are observed for pairs of particles which have large pt values while negative correlations occur for pairs in which one particle has large pt and the other has much lower pt. The correlation amplitudes per final state particle increase with collision centrality. The observed correlations are consistent with a scenario in which the transverse momentum of hadrons associated with initial-stage semi-hard parton scattering is dissipated by the medium to lower pt.

correlations ; momentum ; STAR

The STAR Collaboration.

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Podaci o izdanju

34 (5)

2007.

799-810

objavljeno

0954-3899

1361-6471

10.1088/0954-3899/34/5/002

Povezanost rada

Fizika

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