Testing GUT phase transition via inflated gravitational waves
ABSTRACT
The phase transition associated with spontaneous breaking of the GUT symmetry is generally considered as an unobservable process due to its ultra-high energy scale, and the monopole problem associated with the GUT phase transition is one motivation of inflation. We propose that if a first-order GUT phase transition happens during inflation, the induced gravitational waves (GWs) are redshifted and deformed, and might be observed today in GW observatories. We show that the e-folding number at 15 or 25 can shift the GWs to 10 Hz or mHz hands, respectively, which might be tested in the future ground-based or space-based interferometers. Presentation based on https://arxiv.org/abs/2501.01491
