Revisiting the Affleck-Dine mechanism for primordial black hole formation
Revisiting the Affleck-Dine mechanism for primordial black hole formation
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DOI：
10.1088/1475-7516/2022/10/048
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发表时间：
2022-05
影响因子：
6.4
通讯作者：
Kentaro Kasai;M. Kawasaki;Kai Murai
中科院分区：
文献类型：
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作者：
Kentaro Kasai;M. Kawasaki;Kai Murai
我们研究了基于Affleck-Dine（AD）机制的原始黑洞（PBH）形成方案，并研究了两个PBH质量区域：由LIGO-Virgo观测到的双星黑洞合并引起的M 30 M和由星系中心超大质量黑洞观测引起的M 104 M.在以前的研究中，人们认为非均匀AD重子生成产生了具有大的重子不对称性的区域，其中一些区域坍缩成PBH。在本文中，我们表明，这种情况是严重的限制，由于重子不对称性以外的PBH，这将破坏大爆炸核合成的成功。然后，我们提出了一个替代方案，AD leptogenesis的结果在非均匀形成的Q球与轻子电荷，崩溃成PBH。因此，我们发现，我们的方案可以解释有利的PBH丰度不冲突的观测约束。
We study a primordial black hole (PBH) formation scenario based on the Affleck-Dine (AD) mechanism and investigate two PBH mass regions: M ∼ 30 M ⊙ motivated by the LIGO-Virgo observations of the binary black hole mergers and M ≳ 104 M ⊙ motivated by the observations of supermassive black holes at the center of galaxies. In the previous studies, it has been considered that the inhomogeneous AD baryogenesis generates regions with a large baryon asymmetry, some of which collapse into PBHs. In this paper, we show that this scenario is severely constrained due to the baryon asymmetry remaining outside PBHs, which would spoil the success of the big bang nucleosynthesis. Then, we propose an alternative scenario where the AD leptogenesis results in the inhomogeneous formation of Q-balls with lepton charges, which collapse into PBHs. As a result, we find that our scenario can explain the favorable PBH abundance without conflicting with the observational constraints.