Probing light thermal dark matter with a Higgs portal mediator
Probing light thermal dark matter with a Higgs portal mediator
复制标题
用希格斯门户介体探测光热暗物质
DOI：
10.1103/physrevd.94.073009
复制
发表时间：
2015
影响因子：
5
通讯作者：
G. Krnjaic
中科院分区：
文献类型：
--
作者：
G. Krnjaic
我们系统地研究了光（<几GeV）暗物质（DM）模型，这些模型通过希格斯门与可见物质热化，并确定可行参数空间中剩余的差距。这样的模型需要一个与希格斯粒子混合的光标量介质，以避免DM的过度产生，并可以根据这种介质是否明显衰减来分类。在一个具有代表性的狄拉克费米子DM的基准模型中，我们发现，即使对DM-介质耦合和质量比作保守的假设，介质比DM重的情况也完全被对撞机、稀有介子衰变和直接探测极限的组合所排除;包括NA 62在内的未来和计划中的实验可以进一步提高对希格斯门相互作用不能确定DM丰度的情况的灵敏度。相反，制度中的调解人是轻于DM和后者湮灭对cally-decaying调解人仍然是可行的，但大部分的参数空间是由罕见的介子衰变，超新星冷却，束流转储，和直接检测的限制。几乎所有这些结论都广泛适用于最简单的变化（例如标量或非对称DM）。未来的实验包括SHiP，NEWS和Super-CDMS SNOLAB可以大大提高对这类模型的覆盖率。
We systematically study light (< few GeV) Dark Matter (DM) models that thermalize with visible matter through the Higgs portal and identify the remaining gaps in the viable parameter space. Such models require a comparably light scalar mediator that mixes with the Higgs to avoid DM overproduction and can be classified according to whether this mediator decays (in)visibly. In a representative benchmark model with Dirac fermion DM, we find that, even with conservative assumptions about the DM-mediator coupling and mass ratio, the regime in which the mediator is heavier than the DM is fully ruled out by a combination of collider, rare meson decay, and direct detection limits; future and planned experiments including NA62 can further improve sensitivity to scenarios in which the Higgs portal interaction does not determine the DM abundance. The opposite, regime in which the mediator is lighter than the DM and the latter annihilates to pairs of visibly-decaying mediators is still viable, but much of the parameter space is covered by rare meson decay, supernova cooling, beam dump, and direct detection constraints. Nearly all of these conclusions apply broadly to the simplest variations (e.g. scalar or asymmetric DM). Future experiments including SHiP, NEWS, and Super-CDMS SNOLAB can greatly improve coverage to this class of models.
影响因子：
4.4
作者：
Angloher, G.;Bento, A.;Zoeller, A.
通讯作者：
Zoeller, A.