arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1808.04854hep-ph
收藏

通过标量介体发射的暗物质束缚态

Dark matter bound states via emission of scalar mediators

Ruben Oncala, Kalliopi Petraki

摘要:

如果暗物质(DM)耦合到比自身轻得多的力载体上,那么它可能在早期宇宙和晕内形成束缚态。虽然已知通过矢量发射形成束缚态是有效的,并且具有各种现象学意义,但是通过标量发射捕获通常需要更大的耦合并且与更有限的参数空间相关,这是由于辐射振幅的抵消。然而,该结果仅考虑了三线性DM-DM-介体偶联。具有标量介体的理论也包括标量势,其耦合可能参与辐射跃迁。我们计算这些耦合的辐射捕获的贡献,并确定它们是重要的参数空间。

英文摘要:

If dark matter (DM) couples to a force carrier that is much lighter than itself, then it may form bound states in the early universe and inside haloes. While bound-state formation via vector emission is known to be efficient and have a variety of phenomenological implications, the capture via scalar emission typically requires larger couplings and is relevant to more limited parameter space, due to cancellations in the radiative amplitude. However, this result takes into account only the trilinear DM-DM-mediator coupling. Theories with scalar mediators include also a scalar potential, whose couplings may participate in the radiative transitions. We compute the contributions of these couplings to the radiative capture, and determine the parameter space in which they are important.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑