标题： 电磁级联的暗通量 显示英文标题

标题： Dark fluxes from electromagnetic cascades

摘要： 我们研究电磁（EM）级联中的暗区生产。 这个问题需要对标准模型（SM）和暗区过程进行准确模拟，这两者都会影响发射粒子的角度和能量分布，最终决定下游探测器的通量预测。 我们描述了必须包含的最小QED过程集，以忠实地再现SM级联，并确定了一个通用算法，给定SM冲激的蒙特卡罗模拟来生成暗区通量。 我们提供了一个新工具，$\texttt{PETITE}$，它模拟伴随暗矢量生产的EM级联，并将其与现有文献和“现成”工具进行比较。 下游探测器的信号预测可能强烈依赖于SM和暗区过程的非平凡相互作用（和建模），特别是多次库仑散射和正电子湮灭。 我们评论了这些效应对实际实验设置的潜在影响。 显示英文摘要

摘要： We study dark sector production in electromagnetic (EM) cascades. This problem requires accurate simulations of Standard Model (SM) and dark sector processes, both of which impact angular and energy distributions of emitted particles that ultimately determine flux predictions in a downstream detector. We describe the minimal set of QED processes which must be included to faithfully reproduce a SM cascade, and identify a universal algorithm to generate a dark sector flux given a Monte-Carlo simulation of a SM shower. We provide a new tool, $\texttt{PETITE}$, which simulates EM cascades with associated dark vector production, and compare it against existing literature and "off the shelf" tools. The signal predictions at downstream detectors can strongly depend on the nontrivial interplay (and modelling) of SM and dark sector processes, in particular multiple Coulomb scattering and positron annihilation. We comment on potential impacts of these effects for realistic experimental setups.