发表机构
Sun Yat-sen University (Zhuhai Campus)（中山大学（珠海校区））
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究探讨气泡碰撞中粒子与引力子伴随产生的高频引力波，计算两体和三体过程的谱，发现高频分量可补充低频信号，为未来高频引力波实验和暗物质产生提供新目标。
AI 中文摘要
宇宙学一级相变是众所周知的引力波源，其引力波来自气泡碰撞和等离子体动力学。在这项工作中，我们研究了另一个微观来源，该来源直接源于气泡碰撞过程中粒子与引力子的伴随产生。聚焦于逃逸气泡壁，我们计算了来自两体标量-引力子产生以及涉及标量或费米子对伴随一个引力子的三体过程的引力波谱。我们推导了解析近似并对所得谱进行了数值评估，揭示了高频引力波分量，该分量可以补充来自同一相变的常规低频信号。这一机制提供了潜在的多频带特征，并建立了引力辐射与暗物质或其他新粒子产生之间的联系。我们的发现为未来高频引力波实验提供了新的物理目标，并作为早期宇宙中粒子产生的补充探针。
英文摘要
Cosmological first-order phase transitions are well-known sources of gravitational waves from bubble collisions and plasma dynamics. In this work, we investigate an additional microscopic source directly arising from the associated production of particles and gravitons during bubble collisions. Focusing on runaway bubble walls, we calculate the gravitational wave spectra from two-body scalar-graviton production and three-body processes involving scalar or fermion pairs accompanied by a graviton. We derive analytic approximations and numerically evaluate the resulting spectra, revealing a high-frequency gravitational wave component that can complement conventional lower-frequency signals from the same phase transition. This mechanism offers a potential multiband signature and establishes a connection between gravitational radiation and the production of dark matter or other new particles. Our findings provide a new physics target for future high-frequency gravitational wave experiments and a complementary probe of particle production in the early Universe.
Comments53 pages, 15 figures, comments are welcome
