标题： 原始黑洞和共形中微子质量模型中的磁场 显示英文标题

标题： Primordial black holes and magnetic fields in conformal neutrino mass models

摘要： 足够强烈和持久的一阶相变可以产生原始黑洞（PBHs），这些黑洞能够显著贡献于宇宙的暗物质丰度，并且可以产生大尺度的原始磁场。 我们在一个通用的共形U(1)'模型类中研究了这些机制，该模型还通过I型跷跷板机制解释了活跃中微子振荡数据。 我们发现，在跷跷板尺度介于$10^4$GeV 和$10^{11}$GeV 发生的相变会产生引力波信号，这些信号可以在LISA/ET中被探测到，并且可以与罗马空间望远镜观测到的PBH微透镜信号相关联；而接近$10^{11}$GeV 的尺度则可以与未来伽马射线望远镜观测到的霍金蒸发信号相关联。 如果PBH完全解释了暗物质丰度，LISA可以探测到介于$1\times 10^{-16}M_\odot$和$8\times 10^{-11}M_\odot$之间的整个PBH质量范围。 对于Z'质量在40 TeV和$10^4$TeV之间，以及10 TeV右手中微子，螺旋磁场（强度为$\gtrsim 0.5$pG，相干长度为$\gtrsim 0.008$Mpc，超过当前喷流黑洞下限可以产生。 显示英文摘要

摘要： Sufficiently strong and long-lasting first-order phase transitions can produce primordial black holes (PBHs) that contribute substantially to the dark matter abundance of the Universe, and can produce large-scale primordial magnetic fields. We study these mechanisms in a generic class of conformal U(1)' models that also explain active neutrino oscillation data via the type-I seesaw mechanism. We find that phase transitions that occur at seesaw scales between $10^4$ GeV and $10^{11}$ GeV produce gravitational wave signals at LISA/ET that can be correlated with microlensing signals of PBHs at the Roman Space Telescope, while scales near $10^{11}$ GeV can be correlated with Hawking evaporation signals at future gamma-ray telescopes. LISA can probe the entire range of PBH masses between $1\times 10^{-16}M_\odot$ and $8\times 10^{-11}M_\odot$ if PBHs fully account for the dark matter abundance. For Z' masses between 40 TeV and $10^4$ TeV, and 10 TeV right-handed neutrinos, helical magnetic fields (with magnitudes $\gtrsim 0.5$ pG and coherence lengths $\gtrsim 0.008$ Mpc above current blazar lower bounds can be produced.