Bulletin of the American Physical Society
APS April Meeting 2024
Wednesday–Saturday, April 3–6, 2024; Sacramento & Virtual
Session S13: Cosmology with Gravitational Waves
1:30 PM–3:18 PM,
Saturday, April 6, 2024
SAFE Credit Union Convention Center
Room: Ballroom B8, Floor 2
Sponsoring
Unit:
DGRAV
Chair: Ish Gupta, Pennsylvania State University
Abstract: S13.00007 : Gravitational Wave Signals From Early Matter Domination: Interpolating Between Fast and Slow Transitions
2:42 PM–2:54 PM
Presenter:
Lauren M Pearce
(Pennsylvania State University (New Kensington))
Author:
Lauren M Pearce
(Pennsylvania State University (New Kensington))
The approximations used in these studies make it difficult to interpolate between these regimes, which is necessary to determine the signal from any physically motivated scenario (such as primordial black hole or Q-ball domination). In this work, we present the first complete analysis which uses exact expressions for the scale factor, Hubble parameter, Green's function, and related quantities during the transition period to determine the gravitational wave signal. This allows us to study the intermediate regime and demonstrate the rate at which the resonant peak is suppressed as the transition time lengthens.
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