论文标题
重亚稳态颗粒的重生生成和原始黑洞暗物质
Baryogenesis and Primordial Black Hole Dark Matter from Heavy Metastable Particles
论文作者
论文摘要
我们提出了一个新颖而简单的场景，以利用由重型亚稳态粒子引起的早期物质主导的时代（EMDE）来解释重子不对称和暗物质（DM）。在EMDE内部，缺乏压力会增强原始黑洞（PBH）的形成，然后可以有助于DM的遗物丰度。重稳态粒子的最终衰减，具有baryon数和$ cp $违反相互作用的衰减会加剧宇宙，并引起Baryon不对称性。由于在此设置中，PBH充当DM候选者，因此粒子物理模型可能不需要新的稳定自由度，从而在模型构建方面提供了更多的自由度。例如，我们表明，一个模量领域在宇宙衰变之前占主导地位的模量领域，可以在最小的超级对称标准模型（MSSM）的背景下解释宇宙中的DM和Baryon不对称性，而最轻的超级粒子不稳定，并且由于需要违反r-Paryeose的DM候选，因此无法及时抗衡。
We propose a novel and simple scenario to explain baryon asymmetry and dark matter (DM) by utilizing an early matter-dominated era (EMDE) caused by a heavy metastable particle. Within the EMDE, lack of pressure enhances the formation of primordial black holes (PBHs) which can then contribute to the relic abundance of DM. The eventual decay of heavy metastable particle that has baryon number and $CP$ violating interactions reheats the Universe and gives rise to baryon asymmetry. Since in this setup, PBH serves as a DM candidate, the particle physics model may not require new stable degrees of freedom which leads to more freedom in the model-building side. As an example, we show that a modulus field which dominates the energy density of the Universe prior to its decay, may explain both DM and baryon asymmetry in the Universe in the context of the Minimal Supersymmetric Standard Model (MSSM) while the lightest superparticle is not stable and cannot be a DM candidate due to the R-parity violating interactions needed for baryogenesis.
