Luminal Propagation of Gravitational Waves in Scalar-tensor Theories: The Case for Torsion

José Barrientos, Fabrizio Cordonier-Tello, Cristóbal Corral +4

Scalar-tensor gravity theories with a nonminimal Gauss-Bonnet coupling typically lead to an anomalous propagation speed for gravitational waves, and have therefore been tightly con…