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首页> 外文期刊>Physical review, D >Indirect detection of the partial p wave via the s wave in the annihilation cross section of dark matter
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Indirect detection of the partial p wave via the s wave in the annihilation cross section of dark matter

机译：在暗物质the灭截面中通过s波间接检测部分p波

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For many dark matter models, the annihilation cross section to two-body final states is difficult to probe with current experiments because the dominant annihilation channel is velocity or helicity suppressed. The inclusion of gauge boson radiation for three-body final states can lift the helicity suppression, allowing a velocity-independent cross section to dominate the annihilation process, and providing an avenue to constrain these models. Here we examine experimental constraints on dark matter that annihilates to two leptons plus a bremsstrahlung boson, ? ˉ + ? + γ / W / Z . We consider experimental constraints on photon final states from Fermi-LAT using both diffuse photon data and data from dwarf spheroidal galaxies, and compare to the implied constraints from 21?cm measurements. Diffuse photon line searches are generally the strongest over the entire mass regime. We in particular highlight the model in which dark matter annihilates to two neutrinos and a photon, and show that these models are more strongly constrained through photon measurements than through existing neutrino bounds.
机译：对于许多暗物质模型，由于主要的an灭通道受到速度或螺旋度的抑制，因此很难用当前的实验探测到两体最终状态的an灭截面。包含三体最终状态的规范玻色子辐射可以解除螺旋性抑制，从而允许与速度无关的横截面主导an灭过程，并提供约束这些模型的途径。在这里，我们研究了对暗物质的实验约束，该约束消灭了两个轻子和一个ms致的玻色子。 ˉ+？ +γ/ W / Z。我们考虑使用弥散光子数据和矮球状星系数据对费米-拉特（Fermi-LAT）的光子最终状态进行实验约束，并将其与21？cm测量值的隐含约束进行比较。扩散光子线搜索通常在整个质量范围内最强。我们特别强调了暗物质an灭到两个中微子和一个光子的模型，并表明与通过现有的中微子边界相比，这些模型受光子测量的约束更大。

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