Implications for Cosmic Domain Walls from LIGO-Virgo First Three Observing Runs
arXiv:2208.00697 · doi:10.1103/PhysRevD.106.103036
Abstract
We put constraints on the normalized energy density in gravitaional waves from cosmic domain walls (DWs) by searching for the stochastic gravitational-wave background (SGWB) in the data of Advanced LIGO and Virgo's first three observing runs. By adopting a phenomenological broken power-law model, we obtain the upper limit of normalized energy density of SGWB generated by DWs in the peak frequency band Hz, and get the most stringent limitation at the peak frequency Hz, namely at confidence level (CL). Subsequently, we work out the constraints on the parameter space in the appealing realization of DW structure -- the heavy axion model which can avoid the so-called quality problem.
7 pages, 2 tables and 4 figures
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