Dark nucleosynthesis: cross-sections and astrophysical signals
Dark nucleosynthesis: cross-sections and astrophysical signals
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暗核合成：横截面和天体物理信号
DOI：
10.1088/1475-7516/2021/02/039
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发表时间：
2020
影响因子：
6.4
通讯作者：
A. Tesi
中科院分区：
文献类型：
--
作者：
R. Mahbubani;M. Redi;A. Tesi
我们研究暗物质束缚态的形成及其对间接探测实验的影响。我们专注于暗物质是一个强耦合暗扇区的重子的情况下，并提供一般公式形成浅核束缚态的光子发射，W和Z规范玻色子。这些过程可以通过电和磁跃迁发生，并产生可通过费米和HESS在单色和漫射光子测量中测试的间接信号。我们还研究了将束缚态形成截面分解为短程核部分乘以Sommercion增强因子的有效性。我们发现，短距离核势往往违反因式分解，修改特别是与零能量束缚态的峰的位置。最后，我们重新审视的束缚态形成的（弱耦合）最小DM五重态，包括同位旋断裂效应，并发现它会产生间接检测信号，与当前的界限是兼容的。
We investigate dark matter bound-state formation and its implication for indirect-detection experiments. We focus on the case where dark matter is a baryon of a strongly-coupled dark sector and provide generic formulae for the formation of shallow nuclear bound states on emission of photons, and W and Z gauge bosons. These processes can occur via electric and magnetic transitions, and give rise to indirect signals that are testable in monochromatic and diffuse photon measurements by Fermi and HESS. We also study the validity of factorizing the bound-state formation cross section into a short-distance nuclear part multiplied by Sommerfeld-enhancement factors. We find that the short-distance nuclear potential often violates factorization, modifying in particular the location of the peaks associated with zero-energy bound states. Finally we revisit bound-state formation of a (weakly-coupled) Minimal DM quintuplet including isospin-breaking effects, and find it gives rise to indirect-detection signals that are compatible with current bounds.
大型复合暗物质态的特征
影响因子：
5.4
作者：
Hardy E
通讯作者：
Hardy E
影响因子：
5.4
作者：
Edward Hardy;R. Lasenby;J. March-Russell;S. West
通讯作者：
Edward Hardy;R. Lasenby;J. March-Russell;S. West