Journal article 74 views
Novel probe of graviton dispersion relations at nanohertz frequencies
,
Ameek Malhotra ,
Gianmassimo Tasinato
Physical Review D, Volume: 110, Issue: 12, Start page: 124018
Swansea University Authors:
Bill Atkins , Ameek Malhotra , Gianmassimo Tasinato
Full text not available from this repository: check for access using links below.
DOI (Published version): 10.1103/physrevd.110.124018
Abstract
We generalise Phinney’s ‘practical theorem’ to account for modified graviton dispersion relations motivated by certain cosmological scenarios. Focusing on specific examples, we show how such modifications can induce characteristic localised distortions– bumps– in the frequency profile of the stochas...
| Published in: | Physical Review D |
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| ISSN: | 2470-0010 2470-0029 |
| Published: |
American Physical Society (APS)
2024
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa68301 |
| Abstract: |
We generalise Phinney’s ‘practical theorem’ to account for modified graviton dispersion relations motivated by certain cosmological scenarios. Focusing on specific examples, we show how such modifications can induce characteristic localised distortions– bumps– in the frequency profile of the stochastic gravitational wave background emitted from distant binary sources. We concentrate on gravitational waves at nano-Hertz frequencies probed by pulsar timing arrays, and we forecast the capabilities of future experiments to accurately probe parameters controlling modified dispersion relations. Our predictions are based on properties of gravitational waves emitted in the first inspiral phase of the binary process, and do not rely on assumptions of non-linear effects occurring during the binary merging phase. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
We are partially funded by STFC Grant No. ST/X000648/1. |
| Issue: |
12 |
| Start Page: |
124018 |