论文标题
在原始黑洞的存在下，Littlest Seesaw的黑暗扇区延伸
Dark Sector extensions of the Littlest Seesaw in the presence of Primordial Black Holes
论文作者
论文摘要
Littlest Seesaw模型是一个非常有动力的暗物质模型。在这里，我们考虑了该模型在冻结场景下具有附加标量和额外的费米粒子的扩展。在原始时间的一定质量范围的黑洞形成可以作为暗物质颗粒通过鹰辐射蒸发时的替代生产机制。此外，具有大量能量密度的原始黑洞的存在会导致非标准的宇宙学，这也会改变冻结生产。在本文中，我们研究了在冻结场景下在有原始黑洞的情况下为各种有趣的情况下的冻结场景下的扩展seesaw模型，并相应地限制了参数空间。如果宇宙是原始的黑洞在宇宙的演变中的任何时刻占主导地位，我们发现在这种情况下，最终遗物主要由高暗物质质量的蒸发组件和低暗物质质量的冻结组件组成。
The Littlest Seesaw model is a very well motivated dark matter model. Here we consider an extension of that model with an additional scalar and an additional fermionic particle under the freeze-in scenario. Formation of black hole of a certain mass range at primordial times can act as an alternate production mechanism for the dark matter particles as it evaporates via Hawking radiation. Furthermore, the presence of primordial black holes with substantial energy density gives rise to non-standard cosmology which also modifies the freeze-in production. In this paper, we have investigated the extended Littlest Seesaw model under the freeze-in scenario in the presence of a primordial black hole for various interesting cases and constrained the parameter space accordingly. If the universe is primordial black hole dominated at any point in the evolution of the universe, we find that the final relic in that case is dominated mostly by the evaporation component for a high dark matter mass and by the freeze-in component for a low dark matter mass.
