Modeling Uncertainties in Modified Gravity Predictions for the Stochastic Gravitational-Wave Background
We investigate the impact of modified gravity on the stochastic gravitational wave background (SGWB) generated by a cosmological population of unresolved binary black hole mergers. We consider two complementary classes of beyond General Relativity (GR) effects: waveform generation modifications described within the parametrized post Einsteinian (ppE) framework and cosmological propagation effects associated with a...