Speaker
Description
Several theories beyond the Standard Model predict the occurrence of Domain Walls (DW), topological defects expected to arise from the breaking of a discrete symmetry in the early universe. The motion and the eventual annihilation of these objects are expected to generate a stochastic background of gravitational waves (SGWB), that could in principle be probed by ground-based GW detectors. In this work we build upon our previous search for a double-peaked domain wall motivated SGWB in the O1-O3 LVK data by introducing a novel multi-break power law function, in addition to a more intuitive parametrization of the double peak signal. We follow this mathematical implementation with a phenomenological approach, in order to place constraints on the physical parameters characterizing the DWs and to determine new parameter exclusion zones.
