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Published on: October 11, 2016
Azimuthal-angle dependence of charged-pion-interferometry measurements with respect to second- and third-order event
A Adare1, S Afanasiev2, C Aidala3
1University of Colorado, Boulder, Colorado 80309, USA.
Abstract:
Charged-pion-interferometry measurements were made with respect to the second- and third-order event plane for Au+Au collisions at sqrt[s_{NN}]=200 GeV. A strong azimuthal-angle dependence of the extracted Gaussian-source radii was observed with respect to both the second- and third-order event planes. The results for the second-order dependence indicate that the initial eccentricity is reduced during the medium evolution, which is consistent with previous results. In contrast, the results for the third-order dependence indicate that the initial triangular shape is significantly reduced and potentially reversed by the end of the medium evolution, and that the third-order oscillations are largely dominated by the dynamical effects from triangular flow.
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