Exploring the spin of ultralight dark matter with gravitational wave detectors
Abstract
We propose a novel method for distinguishing the spin of ultralight dark matter (ULDM) using interferometric gravitational wave detectors. ULDM can be a bosonic field of spin-0, 1, or 2, and each induces distinctive signatures in signals. We find that the finite-time traveling effect causes a dominant signal for spin-0 and spin-1 ULDM, but not for spin-2. By using overlap reduction functions (ORF) of multiple detectors, we can differentiate between the spins of ULDM. Furthermore, we point out that the current constraint on the coupling constant of spin-1 ULDM to baryons becomes 30 times weaker when the finite-time light-travel effect on the ORF is taken into account.
- Publication:
-
Physical Review D
- Pub Date:
- May 2024
- DOI:
- 10.1103/PhysRevD.109.095012
- arXiv:
- arXiv:2310.10646
- Bibcode:
- 2024PhRvD.109i5012M
- Keywords:
-
- High Energy Physics - Phenomenology;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- General Relativity and Quantum Cosmology
- E-Print:
- 17 pages, 5 figures