Journal
PHYSICAL REVIEW D
Volume 103, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.103.L021301
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Funding
- NASA Astrophysics Theory Grant [NNX17AG48G]
- National Science Foundation [ACI-1548562, PHY-1719652]
- United States Department of Energy Computational Science Graduate Fellowship [DE-FG02-97ER25308]
- University of Illinois at Urbana-Champaign
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Simulation of the nonperturbative decay of ultralight scalars into Abelian gauge bosons reveals an excess of gravitational-wave signals beyond constraints across the entire parameter space under consideration, suggesting that gravitational-wave production from the decay of early dark energy may offer a unique probe of these models.
We show that the nonperturbative decay of ultralight scalars into Abelian gauge bosons, recently proposed as a possible solution to the Hubble tension, produces a stochastic background of gravitational waves which is constrained by the cosmic microwave background. We simulate the full nonlinear dynamics of resonant dark photon production and the associated gravitational-wave production, finding the signals to exceed constraints for the entire parameter space we consider. Our findings suggest that gravitational-wave production from the decay of early dark energy may provide a unique probe of these models.
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