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arXiv 2102.08394hep-phastro-ph.CO
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光密荷暗物质的稳定性研究

Challenging the Stability of Light Millicharged Dark Matter

Joerg Jaeckel, Sebastian Schenk

摘要:

我们研究了携带微小电荷的轻玻色暗物质的宇宙学稳定性。在高占有数的类波态中,参数共振可以大大增强湮没为规范玻色子的过程。毫荷电粒子可以最低限度地耦合到光子,或者其电磁相互作用可以通过与无质量隐藏光子的动力学混合来介导。在直接耦合电流的情况下,对毫荷的观测约束比参数共振所产生的约束更强。对于动力学混合的情况(理论上优选的),参数空间的大区域受到参数共振的影响,至少导致暗物质场的碎裂,如果不是完全破坏的话。

英文摘要:

We investigate the cosmological stability of light bosonic dark matter carrying a tiny electric charge. In the wave-like regime of high occupation numbers, annihilation into gauge bosons can be drastically enhanced by parametric resonance. The millicharged particle can either be minimally coupled to photons or its electromagnetic interaction can be mediated via kinetic mixing with a massless hidden photon. In the case of a direct coupling current observational constraints on the millicharge are stronger than those arising from parametric resonance. For the (theoretically preferred) case of kinetic mixing large regions of parameter space are affected by the parametric resonance leading at least to a fragmentation of the dark matter field if not its outright destruction.

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。

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