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arXiv 1608.00583hep-phastro-ph.COgr-qc
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逃逸泡碰撞的重子生成和引力波

Baryogenesis and Gravitational Waves from Runaway Bubble Collisions

Andrey Katz, Antonio Riotto

摘要:

我们提出了一个新的机制,在早期宇宙中的重子不对称性的生产。该机制利用了强的一阶相变,在隐藏的扇区中产生失控的气泡,几乎没有摩擦地以超相对论速度传播。这种气泡的碰撞可以非热产生重粒子,这些重粒子进一步衰变到SM中,并产生观察到的重子不对称性。这一过程可以在很低的温度下进行,提供了一种新的后闪锌矿重子形成机制。在本文中,我们提出了一个完全可计算的模型,产生重子不对称沿这些路线,以及逃避所有现有的宇宙学约束。我们强调,从一阶相变的引力波信号是完全通用的,并可能被未来的eLISA干涉仪检测。我们还讨论了其他潜在的信号,这是更多的模型依赖,并指出尚未解决的理论问题,我们的建议。

英文摘要:

We propose a novel mechanism for production of baryonic asymmetry in the early Universe. The mechanism takes advantage of the strong first order phase transition that produces runaway bubbles in the hidden sector that propagate almost without friction with ultra-relativistic velocities. Collisions of such bubbles can non-thermally produce heavy particles that further decay out-of-equilibrium into the SM and produce the observed baryonic asymmetry. This process can proceed at the very low temperatures, providing a new mechanism of post-sphaleron baryogenesis. In this paper we present a fully calculable model which produces the baryonic asymmetry along these lines as well as evades all the existing cosmological constraints. We emphasize that the Gravitational Waves signal from the first order phase transition is completely generic and can potentially be detected by the future eLISA interferometer. We also discuss other potential signals, which are more model dependent, and point out the unresolved theoretical questions related to our proposal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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