Analyzing flow anisotropies with excursion sets in relativistic heavy-ion collisions

Details Analyzing flow anisotropies with excursion sets in relativistic heavy-ion collisions Analyzing flow anisotropies with excursion sets in relativistic heavy-ion collisions

2011-12-06

arxiv.org/abs/1112.1177v1

Physics

Nuclear Physics

Nuclear Theory

5 pages, 4 figures

Scientific paper

We show that flow anisotropies in relativistic heavy-ion collisions can be analyzed using a certain technique of shape analysis of excursion sets recently proposed by us for CMBR fluctuations to investigate anisotropic expansion history of the universe. The technique analyzes shapes (sizes) of patches above (below) certain threshold value for transverse energy/particle number (the excursion sets) as a function of the azimuthal angle and rapidity. Modeling flow by imparting extra anisotropic momentum to the momentum distribution of particles from HIJING, we compare the resulting distributions for excursion sets at two different azimuthal angles. Angles with maximum difference in the two distributions identify the event plane, and the magnitude of difference in the two distributions relates to the magnitude of momentum anisotropy, i.e. elliptic flow.

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