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Azimuthal anisotropy of π0 and η mesons in Au + Au collisions at sNN−−−√=200 GeV

Abstract : The azimuthal anisotropy coefficients v2 and v4 of π0 and η mesons are measured in Au + Au collisions at sNN−−−√=200 GeV as a function of transverse momentum pT (1-14 GeV/c) and centrality. The extracted v2 coefficients are found to be consistent between the two meson species over the measured pT range. The ratio of v4/v22 for π0 mesons is found to be independent of pT for 1-9 GeV/c, implying a lack of sensitivity of the ratio to the change of underlying physics with pT. Furthermore, the ratio of v4/v22 is systematically larger in central collisions, which may reflect the combined effects of fluctuations in the initial collision geometry and finite viscosity in the evolving medium.
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http://hal.in2p3.fr/in2p3-00944766
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Submitted on : Tuesday, February 11, 2014 - 10:39:29 AM
Last modification on : Friday, November 13, 2020 - 9:12:25 AM

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A. Adare, H. Pereira, C. Silvestre, D. Jouan, E. T. Atomssa, et al.. Azimuthal anisotropy of π0 and η mesons in Au + Au collisions at sNN−−−√=200 GeV. Physical Review C, American Physical Society, 2013, 88, pp.064910. ⟨10.1103/PhysRevC.88.064910⟩. ⟨in2p3-00944766⟩

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