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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



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 レコード 生成: 2023-07-01, 最終変更: 2024-07-19


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