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Azimuthal anisotropy and correlations in p+p, d+Au and Au+Au collisions at 200 GeV

A. H. Tang·STAR Collaboration
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Abstract

We present the first measurement of directed flow ($v_1$) at RHIC. $v_1$ is found to be consistent with zero at pseudorapidities $η$ from -1.2 to 1.2, then rises to the level of a couple of percent over the range $2.4 < |η| < 4$. The latter observation is similar to data from NA49 if the SPS rapidities are shifted by the difference in beam rapidity between RHIC and SPS. Back-to-back jets emitted out-of-plane are found to be suppressed more if compared to those emitted in-plane, which is consistent with {\it jet quenching}. Using the scalar product method, we systematically compared azimuthal correlations from p+p, d+Au and Au+Au collisions. Flow and non-flow from these three different collision systems are discussed.

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A. H. Tang, STAR Collaboration. 2004-03-12. Azimuthal anisotropy and correlations in p+p, d+Au and Au+Au collisions at 200 GeV. https://doi.org/10.1088/0954-3899%2F30%2F8%2F097

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