论文标题
QCD轴上窗口和虚假真空希格斯通货膨胀
QCD Axion Window and False Vacuum Higgs Inflation
论文作者
论文摘要
如果通货膨胀期间的哈勃参数$ h _ {\ rm inf} $低于QCD量表，并且如果通货膨胀持续足够长，则已知QCD轴的丰度被抑制。我们表明，如果永恒的旧通货膨胀是由捕获在大田间值中的假真空中的标准模型希格斯场驱动的，则通货膨胀量表上的紧密上限可以显着放松。具体而言，如果错误的真空度位于中间尺度上方，则$ h _ {\ rm inf} $可以大于$ 100 \，$ gev。我们还讨论了从虚假真空到电动真空真空的隧道后的慢速通胀。
The abundance of the QCD axion is known to be suppressed if the Hubble parameter during inflation, $H_{\rm inf}$, is lower than the QCD scale, and if the inflation lasts sufficiently long. We show that the tight upper bound on the inflation scale can be significantly relaxed if the eternal old inflation is driven by the standard-model Higgs field trapped in a false vacuum at large field values. Specifically, $H_{\rm inf}$ can be larger than $100\,$GeV if the false vacuum is located above the intermediate scale. We also discuss the slow-roll inflation after the tunneling from the false vacuum to the electroweak vacuum.
