论文标题
从通货膨胀末端和Ligo质量和较重的原始黑洞起
NANOGrav Signal from the End of Inflation and the LIGO Mass and Heavier Primordial Black Holes
论文作者
论文摘要
释放了12。5年的Pulsar定时阵列数据，重力波（Nanograv）的北美纳米赫兹天文台（Nanograv）最近报告了首次检测随机引力波（SGWB）的随机普通谱的证据。我们研究信号是否可以从$ \ sim 10 $ MEV的末端生成，但是当现场配置沉降到其真空真空时，仍然在现象学上仍然可行的双场通货膨胀。在这种尺度的双场通货膨胀期间，真正的真空气泡可能会塌陷至Ligo质量和较重的原始黑洞。我们表明，只有当此过程发生在一阶相变发生时，产生的引力波谱才能与纳米格拉夫备受赞誉的SGWB信号匹配。我们表明，仅当此过程通过一阶相变发生时，产生的引力波谱才匹配纳米格拉夫SGWB信号。使用latticeeasy，我们还研究了文献中先前的观察结果，即通过降低预热的规模，尽管重力波轮廓的峰值频率移动到较小的值，SGWB的幅度几乎可以保持恒定。我们注意到，此观察结果在预热刻度上分解，$ M \ Lessim 10^{ - 14} 〜M _ {{} _ {\ rm pl}} $。
Releasing the 12.5-year pulsar timing array data, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has recently reported the evidence for a stochastic common-spectrum which would herald the detection of a stochastic gravitational wave background (SGWB) for the first time. We investigate if the signal could be generated from the end of a $\sim 10$ MeV but still phenomenologically viable double-field inflation when the field configuration settles to its true vacuum. During the double-field inflation at such scales, bubbles of true vacuum that can collapse to LIGO mass and heavier primordial black holes form. We show that only when this process happens with a first-order phase transition, the produced gravitational wave spectrum can match with the NANOGrav acclaimed SGWB signal. We show that the produced gravitational wave spectrum matches the NANOGrav SGWB signal only when this process happens through a first-order phase transition. Using LATTICEEASY, we also examine the previous observation in the literature that by lowering the scale of preheating, despite the shift of the peak frequency of the gravitational wave profile to smaller values, the amplitude of the SGWB could be kept almost constant. We notice that this observation breaks down at the preheating scale, $M\lesssim 10^{-14}~m_{{}_{\rm Pl}}$.
