发表机构
McGill University; Oxford University（麦吉尔大学; 牛津大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究宇宙学一级相变中产生的超重暗物质衰变产生高能中微子，并关联引力波信号，提出多信使观测联系。
AI 中文摘要
我们研究了在宇宙学一级相变过程中产生的超重暗物质（DM）衰变所产生的高能中微子（HEνs）。采用过滤暗物质产生机制，我们结合从流体力学确定泡壁速度的最新进展，重新审视了遗迹丰度的计算。我们表明，质量 m_DM≃4.4×10^8 GeV 的暗物质可以重现观测到的遗迹丰度，并容纳诸如 KM3-230213A 这样的超高能中微子事件，而同一相变同时产生随机引力波（GW）背景。尽管在此示例中引力波信号（峰值在 10^4 Hz）尚不可观测，但在较低的暗物质质量 m_DM≲10^6 GeV 下，中微子谱移入与 IceCube 观测相关的能量范围，而相关的引力波信号则移至较低频率，并可达到 Cosmic Explorer、BBO 和 DECIGO 的预期灵敏度。这提供了高能中微子与引力波之间的多信使联系，两种信号都与一级相变中的暗物质产生相关。
英文摘要
We investigate high energy neutrinos (HE$ν$s) from the decay of superheavy dark matter (DM) produced during a cosmological first order phase transition. Adopting the filtered DM production mechanism, we revisit the relic abundance calculation by incorporating recent progress in determining the bubble wall velocity from hydrodynamics. We show that DM with mass $m_{\text{DM}}\simeq 4.4\times10^{8}~\text{GeV}$ can reproduce the observed relic abundance and accommodate ultra high energy neutrino events such as KM3-230213A, while the same phase transition simultaneously generates a stochastic gravitational wave (GW) background. Although the GW signal (which peaks at $10^{4}\,\text{Hz}$) is not yet observable in this example, at lower DM masses $m_{\text{DM}} \lesssim10^{6}~\text{GeV}$, the neutrino spectrum shifts into the energy range relevant for IceCube observations, while the associated GW signal moves to lower frequencies and can reach the projected sensitivities of Cosmic Explorer, BBO, and DECIGO. This gives a multimessenger connection between HE$ν$s and GWs, with both signals connected to DM production in a first order phase transition.
Comments23 pages, 3 figures
