论文标题
光子产生和集体流来自磁性诱发的gluon融合和在高能核冲突的早期阶段分裂
The photon production and collective flows from magnetic induced gluon fusion and splitting in early stage of high energy nuclear collision
论文作者
论文摘要
我们提出了一项在高能核碰撞早期阶段的光子产生的事件研究，该系统由高度占据胶子占主导地位，并由麦克雷伦 - 武马岛模型初始化。当包括强磁场时，通过Gluon融合和分裂过程产生光子。我们研究光子的光谱和集体流，并显示它们对横向动量$ q_ {t} $的依赖性。发现在我们的方法中，从增强不变的glasma产生的光子在频谱上提供了可见的增强，并在总直接光子的$ v_ {2} $上明显贡献。通过在Parton-Hadron-string Dynamics（PHSD）模型的顶部加权的结果，与Au-Au 20 \％-40 \％中心碰撞的实验测量更好地一致，$ \ sqrt {s_ {nn}} = 200 $ GEV。
We present an event-by-event study of photon production in early stage of high energy nuclear collisions, where the system is dominant by highly occupied of gluons and initialized by McLerran-Venugopalan model. The photons are produced through the gluon fusion and splitting processes when strong magnetic field is included. We study the spectra and collective flows of the photons and show their dependence on transverse momentum $q_{T}$. It is found that in our approach the photons from boost invariant evolving glasma provide visible enhancement on spectrum and obvious contribution on $v_{2}$ of the total direct photons. The results, by weighting on top of parton-hadron-string dynamics (PHSD) model, agree even better with experiment measurements in Au-Au 20\%-40\% centrality collisions at $\sqrt{s_{NN}}=200$GeV.
