论文标题

黑洞的黑暗扇形生产和男性生成

Dark sector production and baryogenesis from not quite black holes

论文作者

Aydemir, Ufuk, Ren, Jing

论文摘要

原始黑洞已被认为是有吸引力的暗物质候选者,而某些预测在很大程度上依赖于近马物理学,这些物理学仍有待测试。作为混凝土替代方案,热2-2孔与无事件范围的黑洞非常相似。作为引力崩溃的可能终点,它们不仅可以解决信息损失问题的解决方案,而且自然会导致稳定的残留物。以前,我们认为原始2-2孔残余物是暗物质。由于与残留合并相关的新现象的强烈限制,只有接近普朗克质量的小残留物才能构成所有暗物质。在本文中,我们研究了大多数暗物质由原始2-2孔蒸发产生的颗粒组成的情况,而残余贡献是次要的。质量足够轻的产品可能会导致早期宇宙中相对论的自由度的数量,我们还计算出来。此外,2-2孔蒸发会产生负责重子不对称的颗粒。我们发现,可以通过直接B侵入腐烂或通过瘦素发生进行男性生成。总体而言,普朗克残留案例的可行参数空间类似于带有普朗克残留物的原始黑洞。另一方面,较重的残留物会导致不同的预测,即使残留丰度很小,可行的参数空间也仍然很大。

Primordial black holes have been considered as an attractive dark matter candidate, whereas some of the predictions heavily rely on the near-horizon physics that remains to be tested experimentally. As a concrete alternative, thermal 2-2-holes closely resemble black holes without event horizons. Being a probable endpoint of gravitational collapse, they not only provide a resolution to the information loss problem, but also naturally give rise to stable remnants. Previously, we have considered primordial 2-2-hole remnants as dark matter. Due to the strong constraints from a novel phenomenon associated with remnant mergers, only small remnants with close to the Planck mass can constitute all of dark matter. In this paper, we examine the scenario that the majority of dark matter consists of particles produced by the evaporation of primordial 2-2-holes, whereas the remnant contribution is secondary. The products with light enough mass may contribute to the number of relativistic degrees of freedom in the early universe, which we also calculate. Moreover, 2-2-hole evaporation can produce particles that are responsible for the baryon asymmetry. We find that baryogenesis through direct B-violating decays or through leptogenesis can both be realized. Overall, the viable parameter space for the Planck remnant case is similar to primordial black holes with Planck remnants. Heavier remnants, on the other hand, lead to different predictions, and the viable parameter space remains large even when the remnant abundance is small.

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