论文标题
高能量$ pp $和$ pa $ collisions中的隔离光子生产和pion-photon相关性
Isolated photon production and pion-photon correlations in high-energy $pp$ and $pA$ collisions
论文作者
论文摘要
在RHIC和LHC Energies中，对高能$ PP $和$ PA $碰撞中孤立的光子产生的现象学研究。使用颜色偶极子方法，我们研究了光子的横向动量中的生产横截面差异，考虑到通用偶极子横截面的三种不同的现象学模型。我们还提出了$ PA $与$ pp $ cross部分的速度依赖性的预测。作为对形式主义的进一步测试，对于不同的能量和光子快速矿，我们分析了光子和正向亲核之间方位角$Δ的相关函数。相关函数的特征性双峰结构围绕$ δϕ \simeqπ$先前观察到的drell-yan对生产，这是针对发射到正向快速速度区域的分离光子的，可以通过将来的实验测试。
A phenomenological study of the isolated photon production in high energy $pp$ and $pA$ collisions at RHIC and LHC energies is performed. Using the color dipole approach we investigate the production cross section differential in the transverse momentum of the photon considering three different phenomenological models for the universal dipole cross section. We also present the predictions for the rapidity dependence of the ratio of $pA$ to $pp$ cross sections. As a further test of the formalism, for different energies and photon rapidites we analyse the correlation function in azimuthal angle $Δϕ$ between the photon and a forward pion. The characteristic double-peak structure of the correlation function around $Δϕ\simeq π$ observed previously for Drell-Yan pair production is found for isolated photon emitted into the forward rapidity region which can be tested by future experiments.
