论文标题
部分可观测时空混沌系统的无模型预测
Isolated photon-hadron production in high energy $pp$ and $pA$ collisions at RHIC and LHC
论文作者
论文摘要
我们根据高能量QCD的颜色玻璃冷凝物（CGC）框架，计算出$ pp $和$ pa $的带电的强子的孤立光子产生，其中首次结合了软gluon排放的sudakov效果。我们的结果基于CGC框架中的领先顺序$ q g \ toqγ$通道，并面临着RHIC和LHC的最新数据，涉及角度分布和平面外横向动量分布。我们发现，尽管仅CGC计算导致分布过于狭窄，但借助Sudakov效应，我们可以对数据进行令人满意的描述。以此为基准，我们为CGC中Gluon饱和现象带来的核效应的幅度提供了预测。
We compute the isolated photon production in association with a charged hadron at mid rapidity in $pp$ and $pA$ based on the Color Glass Condensate (CGC) framework of high energy QCD where, for the first time, we incorporate the Sudakov effect of soft gluon emissions. Our results are based on the leading order $q g \to q γ$ channel in the CGC framework and confronted with the recent data from RHIC and LHC concerning the angular distributions and out-of-plane transverse momentum distributions. We find that, while the CGC computation alone results in too narrow distributions, with the help of the Sudakov effect, we can get a satisfactory description of the data. With this as a benchmark, we provide predictions for the magnitude of the nuclear effect brought by the phenomena of gluon saturation in the CGC.
