LHC上的复合暗物质
Composite dark matter at the LHC
- University of Johannesburg（约翰内斯堡大学）
- De La Salle University（德拉萨大学）
- Université Clermont Auvergne（克莱蒙奥弗涅大学）
- Université Lyon 1（里昂第一大学）
- Sorbonne Université（索邦大学）
- Miami University（迈阿密大学）
- Institut de Física d’Altes Energies (IFAE)（高能物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究提出一种复合暗物质模型，通过多个彩色中介子与第三代夸克耦合，结合对撞机搜索、直接/间接探测及遗迹丰度约束，发现专门搜索和展开测量互补，直接探测在强耦合下成主导，但仍存在可行参数空间。
AI中文摘要：
我们研究了一个受复合性启发的模型，其中标量暗物质候选者通过一组非最小集合的彩色矢量型费米子与第三代夸克耦合，这一设计源于部分复合性机制。多个中介子态的同时存在导致了比传统单中介子描述更丰富的现象学，我们将该框架与观测到的暗物质遗迹丰度、直接探测和间接探测约束以及大型强子对撞机（LHC）的数据进行对比。在对撞机方面，我们比较了专门的新物理搜索与标准模型过程的展开测量的灵敏度，并评估了高阶修正对不同产生机制的影响。我们发现，专门搜索通常提供最强的对撞机排除能力，而展开测量则提供互补的灵敏度。随着相互作用强度的增加，直接探测变得越来越有力，并可能成为主导约束。这种更广泛的互补性源于对撞机数据直接测试彩色中介子的产生和衰变，而宇宙学和天体粒子物理观测量则约束着控制暗物质丰度、散射和湮灭的相互作用。尽管当前的约束显著限制了该模型，但与观测到的暗物质遗迹丰度相容的可行区域仍然存在。
英文摘要：
We investigate a composite-inspired model in which a scalar dark matter candidate couples to third-generation quarks through a non-minimal set of coloured vector-like fermions, as motivated by partial compositeness. The simultaneous presence of several mediator states leads to a richer phenomenology than conventional single-mediator descriptions, and we confront the framework with the observed relic abundance, direct-detection and indirect-detection constraints, as well as data from the Large Hadron Collider. At colliders, we compare the sensitivity of dedicated new-physics searches with that of unfolded measurements of Standard Model processes, and we assess the impact of higher-order corrections on the different production mechanisms. We find that dedicated searches generally provide the strongest collider exclusions, while unfolded measurements offer complementary sensitivity. Direct detection becomes increasingly powerful as the interaction strength grows and can become the dominant constraint. This broader complementarity arises because collider data directly test the production and decay of the coloured mediators, whereas cosmological and astroparticle observables constrain the interactions governing dark-matter abundance, scattering and annihilation. Although present constraints significantly restrict the model, viable regions compatible with the observed dark-matter abundance remain.
