Abstract
We present measurements of second and third order azimuthal anisotropies for charged hadrons produced at forward and backward pseudorapidity (3<|η|<3.9) in Cu+Au collisions at sNN=200 GeV. The azimuthal anisotropy strength vn with respect to the event plane is examined as a function of the local charged particle multiplicity dNch/dη. Higher values of v2 and v3 are observed on the Au-going side (−3.9<η<−3) than on the Cu-going side (3<η<3.9). In order to understand how the spatial anisotropy εn of the initial geometry at forward/backward η influences the measured vn, we divided the values of vn at forward/backward η by η-symmetric and asymmetric εn and found that universal behavior of vn/εn as a function of local dNch/dη is achieved when η-symmetric values of εn are used.
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