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

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

2004-03-12

arxiv.org/abs/nucl-ex/0403018v1

J.Phys. G30 (2004) S1235-S1238

Physics

Nuclear Physics

Nuclear Experiment

Quark Matter 2004 proceeding, 4 pages, 3 figures

Scientific paper

10.1088/0954-3899/30/8/097

We present the first measurement of directed flow ($v_1$) at RHIC. $v_1$ is found to be consistent with zero at pseudorapidities $\eta$ from -1.2 to 1.2, then rises to the level of a couple of percent over the range $2.4 < |\eta| < 4$. 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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