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Measurement of identified pi^0 and inclusive photon v_2 and implication to the direct photon production in sqrt(s_NN) = 200 GeV Au+Au collisions

PHENIX Collaboration·S. S. Adler
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Abstract

The azimuthal distribution of identified pi^0 and inclusive photons has been measured in sqrt{s_{NN}} = 200 GeV Au+Au collisions with the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). The second harmonic parameter (v_2) was measured to describe the observed anisotropy of the azimuthal distribution. The measured inclusive photon v_2 is consistent with the value expected for the photons from hadron decay and is also consistent with the lack of direct photon signal over the measured p_T range 1-6 GeV/c. An attempt is made to extract v_2 of direct photons.

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PHENIX Collaboration, S. S. Adler. 2005-12-09. Measurement of identified pi^0 and inclusive photon v_2 and implication to the direct photon production in sqrt(s_NN) = 200 GeV Au+Au collisions. https://doi.org/10.1103/physrevlett.96.032302

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