标题： 可观测的纳米引力波中无尺度超引力的特征 显示英文标题

标题： Observable Signatures of No-Scale Supergravity in NANOGrav

摘要： 鉴于NANOGrav数据，我们首次提供了超弦理论可能的观测特征。 首先，我们在Wess-Zumino型无尺度超引力中自然实现的拐点膨胀势下工作，这些势导致微观原始黑洞（PBH）的形成，引发早期物质主导时期（eMD），并在大爆炸核合成（BBN）之前蒸发。 值得注意的是，我们在纳赫兹、赫兹和千赫兹频率范围内获得了大量的原始引力波（PGW），并与脉冲星时间阵列（PTA）的引力波数据高度一致。 这一PGW背景可以作为通过无尺度超引力存在量子引力的一个令人信服的观测特征。 显示英文摘要

摘要： In light of NANOGrav data we provide for the first time possible observational signatures of Superstring theory. Firstly, we work with inflection-point inflationary potentials naturally realised within Wess-Zumino type no-scale Supergravity, which give rise to the formation of microscopic primordial black holes (PBHs) triggering an early matter-dominated era (eMD) and evaporating before Big Bang Nucleosythesis (BBN). Remarkably, we obtain an abundant production of primordial gravitational waves (PGW) at the frequency ranges of nHz, Hz and kHz and in strong agreement with Pulsar Time Array (PTA) GW data. This PGW background could serve as a compelling observational signature for the presence of quantum gravity via no-scale Supergravity.