Multiparticle azimuthal correlations for extracting event-by-event elliptic and triangular flow in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

We present measurements of elliptic and triangular azimuthal anisotropy of charged particles detected at forward rapidity 1<|η|<3 in Au + Au collisions at sNN=200 GeV, as a function of centrality. The multiparticle cumulant technique is used to obtain the elliptic flow coefficients v2{2},v2{4},v2{6}, and v2{8}, and triangular flow coefficients v3{2} and v3{4}. Using the small-variance limit, we estimate the mean and variance of the event-by-event v2 distribution from v2{2} and v2{4}. In a complementary analysis, we also use a folding procedure to study the distributions of v2 and v3 directly, extracting both the mean and variance. Implications for initial geometrical fluctuations and their translation into the final-state momentum distributions are discussed.

Note:

449 authors from 66 institutions, 16 pages, 16 figures, 2 tables. Submitted to Physical Review Letters. 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

Relativistic Nuclear Collisions
fluctuation: geometrical
angular distribution: anisotropy
heavy ion: scattering
elliptic flow
triangular flow
angular correlation
momentum spectrum
charged particle
rapidity

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Multiparticle azimuthal correlations for extracting event-by-event elliptic and triangular flow in Au+++Au collisions at sNN=200\sqrt{s_{_{NN}}}=200sNN​​​=200 GeV

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Multiparticle azimuthal correlations for extracting event-by-event elliptic and triangular flow in Au $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV