Dark matter bound states via emission of scalar mediators

被引：0
作者：
Ruben Oncala
Kalliopi Petraki
机构：
[1] Nikhef,
[2] Laboratoire de Physique Théorique et Hautes Energies (LPTHE),undefined
[3] UMR 7589 CNRS & Sorbonne Université,undefined
来源：
Journal of High Energy Physics | / 2019卷
关键词：
Beyond Standard Model; Nonperturbative Effects; Cosmology of Theories beyond the SM;
D O I：
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中图分类号：
学科分类号：
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.
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