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arXiv · 0805.4058

Refraction of Gluon jet in QGP

Hanzhong Zhang·Enke Wang
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Abstract

We introduce photon-like refraction for gluon jet in quark gluon plasma created in high energy nucleus-nucleus collisions. A quark jet goes straightly while a gluon jet is assumed to bend in the non-homogeneous medium. Combining refraction and energy loss, we calculate the away-side dihadron $Δϕ$ distribution in central $Au+Au$ collisions at RHIC energy. The dihadrons from quark-quark pair center around $Δϕ=π$, while the dihadrons from quark-gluon and gluon-gluon pair are deflected from $Δϕ=π$. The resulting distribution shows three peaks at intermediate $p_T$ since both quark-quark and quark-gluon are important. However we only observe one center peak at high $p_T$, where the quark-quark contribution dominates. These observation qualitatively agrees with the experiment data.

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Hanzhong Zhang, Enke Wang. 2008-05-27. Refraction of Gluon jet in QGP. https://arxiv.org/abs/0805.4058

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