ホーム > Cosmic Superstrings Revisited in Light of NANOGrav 15-Year Data |
Article | |
Report number | arXiv:2306.17147 ; KCL-PH-TH/2023-38 ; CERN-TH-2023-126 ; AION-REPORT/2023-07 |
Title | Cosmic Superstrings Revisited in Light of NANOGrav 15-Year Data |
Author(s) | Ellis, John (King's Coll. London ; CERN) ; Lewicki, Marek (Warsaw U.) ; Lin, Chunshan (Jagiellonian U. (main)) ; Vaskonen, Ville (Unlisted, EE ; INFN, Padua) |
Publication | 2023-11-09 |
Imprint | 2023-06-29 |
Number of pages | 6 |
In: | Phys. Rev. D 108 (2023) 103511 |
DOI | 10.1103/PhysRevD.108.103511 (publication) |
Subject category | hep-th ; Particle Physics - Theory ; hep-ph ; Particle Physics - Phenomenology ; gr-qc ; General Relativity and Cosmology ; astro-ph.HE ; Astrophysics and Astronomy ; astro-ph.CO ; Astrophysics and Astronomy |
Abstract | We analyze cosmic superstring models in light of NANOGrav 15-year pulsar timing data. A good fit is found for a string tension $G \mu \sim 10^{-12} - 10^{-11}$ and a string intercommutation probability $p \sim 10^{-3} - 10^{-1}$. Extrapolation to higher frequencies assuming standard Big Bang cosmology is compatible at the 68% CL with the current LIGO/Virgo/KAGRA upper limit on a stochastic gravitational wave background in the 10 to 100 Hz range. The superstring interpretation of the NANOGrav data would be robustly testable by future experiments even in modified cosmological scenarios. |
Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2023-2024 American Physical Society |