论文标题
使用原始黑洞质量分布和重力波检查通货膨胀的结束
Examining the end of inflation with primordial black holes mass distribution and gravitational waves
论文作者
论文摘要
我们明确构建了一个双场通货膨胀模型，该模型满足宇宙微波背景（CMB）尺度上最新的Planck约束，并在质量黑孔（PBHS）中产生整个暗物质能量密度，质量为$ 10^{-17} 〜M _ {\ odot} 〜M _ {\ odot} pbh}} \ sillsim 10^{ - 13} 〜m _ {\ odot} $。在膨胀的气泡结束后，可以在膨胀过程中成核的真空气泡产生PBH。 Obtaining PBHs in this mass range enforces the scale of inflation to be extremely low, $10^{-7} \lesssim H \lesssim 10^{-3} ~{\rm GeV}$, which makes the efforts to observe gravitational waves at the CMB scales futile, although it is high enough to allow for a successful big bang nucleosynthesis.我们将证明，PBHS的质量分布的形状取决于通货膨胀的结尾，并且宇宙从亚稳态方向定居至真实方向。通货膨胀的末端也可以通过检查重力波频谱来探测。特别是，我们表明，如果从滚动亚稳态方向退出到电势的真空中，通过慢速通货膨胀结束后的一阶相变发生，它留下了随机的引力波背景（SGWB），这可能是可以被激光器干扰器空间天线观察到的。从通货膨胀结束时检查PBHS和可能的SGWB的质量分布，我们也许能够获得有关通货膨胀终结的宝贵信息。
We explicitly construct a double-field inflationary model, which satisfies the latest Planck constraints at the cosmic microwave background (CMB) scales and produces the whole dark matter energy density as primordial black holes (PBHs), in the mass range $10^{-17}~M_{\odot}\lesssim M_{{}_{\rm PBH}}\lesssim 10^{-13}~M_{\odot}$. The PBHs can be produced after the end of slow-roll inflation from the bubbles of true vacuum that nucleate during the course of inflation. Obtaining PBHs in this mass range enforces the scale of inflation to be extremely low, $10^{-7} \lesssim H \lesssim 10^{-3} ~{\rm GeV}$, which makes the efforts to observe gravitational waves at the CMB scales futile, although it is high enough to allow for a successful big bang nucleosynthesis. We will show that the shape of the mass distribution of the PBHs is dependent on how inflation ends and the Universe settles from the metastable direction to the true one. End of inflation can also be probed by examining the gravitational waves spectrum. In particular, we show that if exit from the rolling metastable direction to the true vacuum of the potential happens through a first-order phase transition after the end of slow-roll inflation, it leaves behind a stochastic gravitational wave background (SGWB), which is potentially observable by the Laser Interferometer Space Antenna. Examining the mass distribution of PBHs and possible SGWB from the end of inflation, we may be able to gain invaluable information about the end of inflation.
