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arXiv 0705.0842nucl-ex
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高$p_T$强子-强子和光子-强子方位角关联的PHENIX测量

PHENIX Measurement of High-$p_T$ Hadron-hadron and Photon-hadron Azimuthal Correlations

J Jin

摘要:

用PHENIX实验在$\sqrt{s_{NN}}=200$ GeV的$\Cu$和$\pp$碰撞中测量了高的$p_T$强子-强子关联。通过比较两个碰撞系统的喷流宽度和产额,我们可以研究介质对喷流的影响。我们还首次测量了$\Au$和$\pp$碰撞中的直接光子-强子关联。我们发现,在这两个系统的近端产额是一致的零。通过比较远侧的喷流产额,我们观察到一个建议的预期抑制强子与光子在$\Au$碰撞。

英文摘要:

High-$p_T$ hadron-hadron correlations have been measured with the PHENIX experiment in $\Cu$ and $\pp$ collisions at $\sqrt{s_{NN}}=200$ GeV. A comparison of the jet widths and yields between the two colliding systems allows us to study the medium effect on jets. We also present a first measurement of direct photon-hadron correlations in $\Au$ and $\pp$ collisions. We find that the near-side yields are consistent with zero in both systems. By comparing the jet yields on the away side, we observe a suggestion of the expected suppression of hadrons associated with photons in $\Au$ collisions.

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