Measurement of the higher-order anisotropic flow coefficients for identified hadrons in Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV

Measurements of the anisotropic flow coefficients v2{Ψ2},v3{Ψ3},v4{Ψ4}, and v4{Ψ2} for identified particles (π±,K±, and p+p¯) at midrapidity, obtained relative to the event planes Ψm at forward rapidities in Au + Au collisions at sNN=200GeV, are presented as a function of collision centrality and particle transverse momenta pT. The vn coefficients show characteristic patterns consistent with hydrodynamical expansion of the matter produced in the collisions. For each harmonic n, a modified valence quark-number Nq scaling [plotting vn{Ψm}/(Nq)n/2 versus transverse kinetic energies (KET)/Nq] is observed to yield a single curve for all the measured particle species for a broad range of KET. A simultaneous blast-wave model fit to the observed vn{Ψm}(pT) coefficients and published particle spectra identifies radial flow anisotropies ρn{Ψm} and spatial eccentricities sn{Ψm} at freeze-out. These are generally smaller than the initial-state participant-plane geometric eccentricities ɛn{ΨmPP} as also observed in the final eccentricity from quantum interferometry measurements with respect to the event plane.

Note:

387 authors, 8 pages, 4 figures, 1 table. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html •
387 authors, 8 pages, 4 figures, 1 table. v2 is the version accepted for publication in Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

25.75.Dw
flow: anisotropy
higher-order
gold
impact parameter
pi
K
p antinucleon
transverse momentum
PHENIX

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Measurement of the higher-order anisotropic flow coefficients for identified hadrons in Au+++Au collisions at sNN\sqrt{s_{_{NN}}}sNN​​​ = 200 GeV

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Measurement of the higher-order anisotropic flow coefficients for identified hadrons in Au $+$ Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV