Indirect searches for dark matter (DM) have conventionally been applied to the products of DM annihilation or decay. If DM couples to light force carriers, however, it can be captured into bound states via dissipation of energy that may yield detectable signals. We extend the indirect searches to DM bound state formation and transitions between bound levels, and constrain the emission of unstable dark photons. Our results significantly refine the predicted signal flux that could be observed in experiments. As a concrete example, we use Fermi-LAT dwarf spheroidal observations to obtain constraints in terms of the dark photon mass and energy which we use to search for the formation of stable or unstable bound states.

中文翻译：

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间接搜索暗物质的束缚态形成和能级跃迁

常规上，暗物质（DM）的间接搜索已应用于DM hil灭或衰变的产物。但是，如果DM耦合到轻型载具，则可以通过能量消散将其捕获到绑定状态，这可能会产生可检测的信号。我们将间接搜索扩展到DM束缚态的形成和束缚能级之间的过渡，并约束不稳定的暗光子的发射。我们的结果极大地改善了在实验中可以观察到的预测信号通量。作为一个具体的例子，我们使用费米-拉特矮小球体观测来获得关于暗光子质量和能量的约束条件，我们将这些约束条件用于搜索稳定或不稳定束缚态的形成。