CGC for ultra-peripheral Pb+Pb collisions at the Large Hadron Collider: a more realistic calculation
CGC for ultra-peripheral Pb+Pb collisions at the Large Hadron Collider: a more realistic calculation
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DOI：
10.1007/jhep12(2022)077
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发表时间：
2022-08
影响因子：
5.4
通讯作者：
Haowu Duan;A. Kovner;V. Skokov
中科院分区：
文献类型：
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作者：
Haowu Duan;A. Kovner;V. Skokov
我们提供了在彩色玻璃凝聚框架中超外围碰撞中速双胶子产生的第一个计算。为了估计由于对接近真实光子的波函数理解不足而导致的系统不确定性，我们考虑了两种截然不同的模型：稀夸克-反夸克偶极子近似和矢量介子，其中色荷密度由McLerran-Venugopalan模型近似。在实验相关范围内，靶核可以用高度饱和状态忠实地近似。这种简化使我们能够进行有效的数值模拟并提取双胶子相关函数和相关的方位角谐波。
We provide the first calculation of two-gluon production at mid-rapidity in ultra-peripheral collisions in the Color Glass Condensate framework. To estimate systematic uncertainty associated with poor understanding of the wave function of the nearly real photon, we consider two diametrically different models: the dilute quark-antiquark dipole approximation and a vector meson, in which color charge density is approximated by McLerran-Venugopalan model. In the experimentally relevant range, the target nucleus can be faithfully approximated by a highly saturated state. This simplification enables us to perform efficient numerical simulations and extract the two-gluon correlation functions and the associated azimuthal harmonics.