强过冷相变中的快子粒子产生
Tachyonic particle production in strongly supercooled phase transitions
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中文总结 AI 辅助
本文研究强过冷相变中标量场演化导致的快子粒子产生，指出其可高效转化能量并影响引力波谱、气泡速度及原初黑洞形成。
中文摘要 AI 辅助
在强过冷的宇宙学相变中，标量场通常会转变到远低于其势能最小值的数值，这类相变通常会引发强且可观测的引力波背景。我们研究了由场的后续演化引起的粒子产生。由于某些模式暂时具有快子质量，它们可以被高效地产生，并且相变释放的能量密度中有相当一部分可以转化为粒子而非梯度能量。这对气泡相互作用引起的引力波谱的形状和振幅产生影响，并产生新的高频信号。此外，它还影响气泡膨胀速度和状态方程，这可能促进原初黑洞的形成。
英文摘要
In strongly supercooled cosmological phase transitions, which generically lead to strong, observable gravitational-wave backgrounds, the scalar field typically transitions to a value well below the minimum of its potential. We study particle production caused by the subsequent evolution of the field. Because some modes feature temporarily tachyonic masses, they can be efficiently produced, and a significant fraction of the energy density released in the phase transition can get converted to particles rather than gradient energy. This has consequences for the shape and amplitude of the gravitational-wave spectrum caused by the interactions in bubbles and sources a new, high-frequency signal. Moreover, it affects the bubble expansion velocity and equation of state, which can facilitate the formation of primordial black holes.
发表机构
- University of Warsaw（华沙大学）
- CERN（欧洲核子研究中心）
- University of Helsinki（赫尔辛基大学）
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