Inhomogeneous baryogenesis, cosmic antimatter, and dark matter
Inhomogeneous baryogenesis, cosmic antimatter, and dark matter
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DOI：
10.1016/j.nuclphysb.2008.08.029
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发表时间：
2008-06
期刊：
影响因子：
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通讯作者：
A. Dolgov;M. Kawasaki;N. Kevlishvili
中科院分区：
文献类型：
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作者：
A. Dolgov;M. Kawasaki;N. Kevlishvili
描述了基于阿弗莱克和丁机制的不均匀重子发生模型。标量重子场与暴胀子的简单耦合可以形成具有大重子（或反重子）不对称性的具有天文意义的气泡。在进一步的演化过程中，这些区域形成致密的类恒星物体，或密度较低的云，或不同大小的原始黑洞。根据这种情况，如此高重子数的物体占据相对较小的空间，但尽管如此，它们可能对宇宙质量密度有显着贡献。对于某些参数值，该模型允许宇宙中整个暗物质都是重子物质的可能性。此外，该模型允许反重子 B 气泡的存在，即宇宙中质量密度的很大一部分可以以致密反物质物体（例如反恒星）的形式存在。
A model of inhomogeneous baryogenesis based on the Affleck and Dine mechanism is described. A simple coupling of the scalar baryon field to the inflaton allows for formation of astronomically significant bubbles with a large baryon (or antibaryon) asymmetry. During the farther evolution these domains form compact stellar-like objects, or lower density clouds, or primordial black holes of different size. According to the scenario, such high baryonic number objects occupy relatively small fraction of space but despite that they may significantly contribute to the cosmological mass density. For some values of parameters the model allows the possibility the whole dark matter in the universe to be baryonic. Furthermore, the model allows the existence of the antibaryonic B-bubbles, i.e. a significant fraction of the mass density in the universe can be in the form of the compact antimatter objects (e.g. antistars).