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Learn about gravitational waves and domain wall networks in this lecture from the "Hearing beyond the standard model with cosmic sources of Gravitational Waves" program. Explore how the experimental detection of gravitational waves from merging black holes and neutron stars has opened new possibilities for probing physics beyond the Standard Model. Discover various cosmological sources of gravitational waves, including inflation-related tensor perturbations, primordial black holes, first-order phase transitions, and topological defects. Examine recent findings from NANO-Grav, InPTA, and other PTA collaborations regarding the first evidence of Stochastic Gravitational Wave Background detection. Understand how gravitational wave detection can help investigate high-scale physics phenomena that may be unreachable through conventional terrestrial or astroparticle physics experiments.
