Anisotropic Flow of Charged Particles in Pb-Pb Collisions at √sNN = 5.02 TeV
ALICE Collaboration. (2016). Anisotropic Flow of Charged Particles in Pb-Pb Collisions at √sNN = 5.02 TeV. Physical Review Letters, 116(13), Article 132302. https://doi.org/10.1103/PhysRevLett.116.132302
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Physical Review LettersTekijät
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2016Tekijänoikeudet
© 2016 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of
the Creative Commons Attribution 3.0 License.
We report the first results of elliptic (v2), triangular (v3), and quadrangular (v4) flow of charged particles
in Pb-Pb collisions at a center-of-mass energy per nucleon pair of
√sNN p ¼ 5.02 TeV with the ALICE
detector at the CERN Large Hadron Collider. The measurements are performed in the central
pseudorapidity region jηj < 0.8 and for the transverse momentum range 0.2 < pT < 5 GeV=c.
The anisotropic flow is measured using two-particle correlations with a pseudorapidity gap greater than
one unit and with the multiparticle cumulant method. Compared to results from Pb-Pb collisions at
√sNN p ¼ 2.76 TeV, the anisotropic flow coefficients v2, v3, and v4 are found to increase by ð3.0 0.6Þ%,
ð4.3 1.4Þ%, and ð10.2 3.8Þ%, respectively, in the centrality range 0%–50%. This increase can be
attributed mostly to an increase of the average transverse momentum between the two energies. The
measurements are found to be compatible with hydrodynamic model calculations. This comparison
provides a unique opportunity to test the validity of the hydrodynamic picture and the power to further
discriminate between various possibilities for the temperature dependence of shear viscosity to entropy
density ratio of the produced matter in heavy-ion collisions at the highest energies.
...
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0031-9007Asiasanat
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