标题： 探索MATHUSLA中的隐藏山谷 显示英文标题

标题： Exploring the Hidden Valley at MATHUSLA

摘要： 隐藏山谷模型自然预测了许多长寿命粒子，其独特的信号将是隐藏山谷场景的有力证据。 由于这些粒子通常能量较低，它们在传统大型强子对撞机搜索中通过能量触发构成了挑战。 MATHUSLA实验专门设计用于检测长寿命粒子。 它还具备相对于ATLAS和CMS检测更低能量粒子的能力。 在本文中，我们评估MATHUSLA在有效探测隐藏山谷模型方面的潜力。 作为基准，我们假设隐藏山谷区通过一个与标准模型夸克以及隐藏山谷夸克耦合的重矢量传播子与标准模型区相互作用。 我们使用PYTHIA模拟隐藏山谷区的喷注和强子化，并研究探测器接受度作为隐藏山谷介子寿命的函数。 我们发现，MATHUSLA具备显著的能力来探索隐藏山谷模型中此前未被探索的参数空间。 显示英文摘要

摘要： Hidden valley models naturally predict numerous long-lived particles, the distinctive signatures of which would be compelling evidence for a hidden valley scenario. As these are typically low energy particles, they pose a challenge in terms of passing energy triggers in traditional searches at the Large Hadron Collider. The MATHUSLA experiment is specifically designed for the purpose of detecting long-lived particles. It also has the capability of detecting lower energy particles relative to ATLAS and CMS. In this paper, we assess MATHUSLA's potential for effectively probing hidden valley models. As a benchmark, we assume the hidden valley sector communicates with Standard Model sectors via a heavy vector propagator that couples to Standard Model quarks as well as hidden valley quarks. We model the showering and hadronization in the hidden valley sector using PYTHIA, and study the detector acceptance as a function of the hidden valley meson's lifetime. We find that MATHUSLA possesses significant capabilities to explore previously uncharted parameter space within hidden valley models.