Observable signatures of no-scale supergravity in NANOGrav
In light of NANOGrav data, we provide for the first time possible observational signatures of Superstring theory. First, we work with inflection-point inflationary potentials naturally realized 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 nucleosynthesis (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) gravitational wave (GW) data. This PGW background could serve as a compelling observational signature for the presence of quantum gravity via no-scale Supergravity.
Authors
- Theodoros Papanikolaou (ORCID: https://orcid.org/0000-0001-8759-5411)
- Charalampos Tzerefos (ORCID: https://orcid.org/0000-0001-7489-1940)
- D.V. Nanopoulos
- Emmanuel N. Saridakis (ORCID: https://orcid.org/0000-0003-1500-0874)
- Spyros Basilakos (ORCID: https://orcid.org/0000-0001-5066-0259)
Institutions
- University of Science and Technology of China (CN)
- Houston Advanced Research Center (US)
- National and Kapodistrian University of Athens (GR)
- European University Cyprus (CY)
- Academy of Athens (GR)
- Mitchell Institute (US)
- Universidad Católica del Norte (CL)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT)
- National Observatory of Athens (GR)
- Scuola Superiore Meridionale (IT)
- Texas A&M University (US)
Publication Details
- Journal
- International Journal of Modern Physics D
- Published
- 2024-10-07
- DOI
- https://doi.org/10.1142/s0218271824410141
- Citations
- 3
- Primary Topic
- Cosmology and Gravitation Theories
- Type
- article
- Field-Weighted Citation Impact
- 0.99