The study of photon-induced reactions in collisions of heavy nuclei at RHIC and the LHC has become an important direction of the research program of these facilities in recent years. In particular, the production of vector mesons in ultra-peripheral collisions (UPC) has been intensively studied. Owing to the intense photon fluxes, the two nuclei participating in such processes undergo electromagnetic dissociation producing neutrons at beam rapidities. Here, we introduce the $\textbf{n$\mathbf{_O^O}$n}$ (pronounced noon) Monte Carlo program, which generates events containing such neutrons. $\textbf{n$\mathbf{_O^O}$n}$ is a ROOT based program that can be interfaced with existing generators of vector meson production in UPC or with theoretical calculations of such photonuclear processes. $\textbf{n$\mathbf{_O^O}$n}$ can also be easily integrated with the simulation programs of the experiments at RHIC and the LHC.

中文翻译：

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用于超外围碰撞的前向中子发生器：nOOn

近年来，RHIC与LHC重核碰撞中光子诱导反应的研究已成为这些设施研究计划的重要方向。特别是，超外围碰撞（UPC）中矢量介子的产生已得到深入研究。由于强烈的光子通量，参与这种过程的两个原子核进行电磁离解，以束流速度产生中子。在这里，我们介绍 $\textbf{n$\mathbf{_O^O}$n}$（发音为 noon）蒙特卡罗程序，它生成包含此类中子的事件。$\textbf{n$\mathbf{_O^O}$n}$ 是一个基于 ROOT 的程序，可以与 UPC 中现有的矢量介子产生发生器或此类光核过程的理论计算相连接。