论文标题
对迟到时间违反对等值原理的限制
Constraints on Late Time Violations of the Equivalence Principle in the Dark Sector
论文作者
论文摘要
如果由于标量场的演变而导致黑暗能是动态的，那么通常，预计标量与物质耦合。虽然与标准模型粒子的耦合受到局部实验的高度限制，但耦合到暗物质（DM）的边界仅从宇宙学观测中获得，因此它们较弱。最近指出的是，由于暗能量本身的演变，耦合本身只有在黑暗能源统治时才能变得非零，从而导致违反了深色部门的等价原理（EP）。在本文中，我们研究了一个特定的模型，并表明DM部门中对EP的这种较晚违规并非受宇宙学背景的演变和线性状态中的可观察性（例如，来自宇宙微波背景辐射）的强烈限制。必须对非线性政权的扰动进行研究，以更严重地限制对等效原则的限制。
If dark energy is dynamical due to the evolution of a scalar field, then in general it is expected that the scalar is coupled to matter. While couplings to the standard model particles are highly constrained by local experiments, bounds on couplings to dark matter (DM) are only obtained from cosmological observations and they are consequently weaker. It has recently been pointed out that the coupling itself can become non-zero only at the time of dark energy domination, due to the evolution of dark energy itself, leading to a violation of the equivalence principle (EP) in the dark sector at late times. In this paper we study a specific model and show that such late-time violations of the EP in the DM sector are not strongly constrained by the evolution of the cosmological background and by observables in the linear regime (e.g. from the cosmic microwave background radiation). A study of perturbations in non-linear regime is necessary to constrain late--time violations of the equivalence principle much more strongly.
