Importance of Granular Structure in the Initial Conditions for the Elliptic Flow

We show effects of granular structure of the initial conditions (IC) of hydrodynamic description of high-energy nucleus-nucleus collisions on some observables, especially on the elliptic-flow parameter v2. Such a structure enhances production of isotropically distributed high-pT particles, making v2 smaller there. Also, it reduces v2 in the forward and backward regions where the global matter density is smaller, so where such effects become more efficacious.

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4 pages, 5 figures

24.10.Nz
25.75.Ld
25.75.-q
scattering: heavy ion
gold
hydrodynamics
energy: density
charged particle: emission
transverse momentum: spectrum
particle flow: anisotropy

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