论文标题
与gambit I的全球简化模型。
Global fits of simplified models for dark matter with GAMBIT I. Scalar and fermionic models with s-channel vector mediators
论文作者
论文摘要
简化的模型提供了一种有用的方法来研究少数新粒子对实验性可观察物的影响和这些可观察到的相互作用的影响，而无需构造潜在的理论。在这项研究中，我们使用一组最新的可能性检测，直接检测和对撞机搜索的可能性集，并使用Gambit进行全球简化的暗物质模型。我们研究了标量或费米子暗物质候选夫妇通过S通道矢量介体与夸克的模型。每个模型的参数空间的大部分都可以生存。在狄拉克或主要武器暗物质的情况下，LHC单射线搜索和遗物密度限制的过量倾向于偏爱共振区域，在这些区域中，暗物质大约是介体质量的一半。矢量和轴向向量耦合与Dirac候选者的结合也导致了直接检测和违反单位性的竞争限制。
Simplified models provide a useful way to study the impacts of a small number of new particles on experimental observables and the interplay of those observables, without the need to construct an underlying theory. In this study, we perform global fits of simplified dark matter models with GAMBIT using an up-to-date set of likelihoods for indirect detection, direct detection and collider searches. We investigate models in which a scalar or fermionic dark matter candidate couples to quarks via an s-channel vector mediator. Large parts of parameter space survive for each model. In the case of Dirac or Majorana fermion dark matter, excesses in LHC monojet searches and relic density limits tend to prefer the resonance region, where the dark matter has approximately half the mass of the mediator. A combination of vector and axial-vector couplings to the Dirac candidate also leads to competing constraints from direct detection and unitarity violation.
