Title: Baryogenesis and Gravitational Waves from Runaway Bubble Collisions Show Chinese title

Title: 重子生成与失控气泡碰撞产生的引力波

Abstract: 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. Show Chinese abstract

Abstract: 我们提出了一种在早期宇宙中产生重子不对称性的新机制。 该机制利用了产生逃逸气泡的强一阶相变，这些气泡在隐藏扇区中以几乎无摩擦的超相对论速度传播。 这种气泡的碰撞可以非热地产生重粒子，这些粒子随后在非平衡状态下衰变为标准模型，从而产生观测到的重子不对称性。 这一过程可以在非常低的温度下进行，提供了一种新的后 sphaleron 重子生成机制。 在本文中，我们提出了一种完全可计算的模型，沿着这些思路产生重子不对称性，并且避免了所有现有的宇宙学约束。 我们强调， 一阶相变产生的引力波信号是完全通用的，可能被未来的 eLISA 干涉仪检测到。 我们还讨论了其他潜在信号，这些信号更依赖于模型，并指出了与我们的提议相关的未解决理论问题。