The Standard Model of particle physics predicts the existence of quantum tunnelling processes across topological inequivalent vacua, commonly known as Instantons. In Quantum Chromodynamics, these Instantons play a fundamental role in explaining much of the theory long-distance behaviour. However, they have not yet been observed experimentally. Their direct observation would mark a breakthrough in modern particle physics, shedding light on our fundamental understanding of the non perturbative dynamics in the Standard Model. Recently, new calculations for QCD Instanton processes in proton–proton collisions became public, suggesting sizeable cross sections as well as possible experimental signatures at the LHC. In this work, we explore possible analysis strategies for the LHC experiments to discover small-size QCD Instanton induced processes. Moreover, we derive a first limit on the Instanton production cross section using published data of Minimum Bias processes at \(\sqrt{s}=\)13 TeV at the LHC.

粒子物理学的标准模型预测了跨越拓扑不等价真空的量子隧道过程的存在，通常称为瞬时子。在量子色动力学中，这些瞬时子在解释大部分理论长距离行为方面发挥着重要作用。然而，它们还没有被实验观察到。他们的直接观察将标志着现代粒子物理学的突破，阐明我们对标准模型中非微扰动力学的基本理解。最近，质子-质子碰撞中 QCD Instanton 过程的新计算公开，表明 LHC 具有相当大的横截面以及可能的实验特征。在这项工作中，我们探索了 LHC 实验的可能分析策略，以发现小尺寸 QCD Instanton 诱导过程。\(\sqrt{s}=\)在 LHC 上为 13 TeV。