We provide a consistent description of the reheating era of a constrained Gauss-Bonnet model by using the same free parameters that result in a viable inflationary era. The theory predicts a propagation velocity of tensor perturbations which is equal to unity in order to be in agreement with the GW170817 event. The reheating era turns out to be …

Testing a CPT-symmetric twin-universe framework where a slight phase desynchronization (≈5%) between Siamese universes generates the observed matter–antimatter asymmetry. Includes numerical scans, CMB–FRB anisotropy tests, and reproducible data analysis scripts.