  In this article, we compute the two observables, impulse and waveform, in a
black hole scattering event for the Scalar-Tensor theory of gravity with a
generic scalar potential using the techniques of Worldline Quantum Field
Theory. We mainly investigate the corrections to the above mentioned
observables due to the extra scalar degree of freedom. For the computation of
impulse, we consider the most general scenario by making the scalar field
massive and then show that each computed diagram has a smooth massless limit.
We compute the waveform for scalar and graviton up to 2PM, taking the scalar as
massless. Furthermore, we discuss if the scalar has mass and how the radiation
integrals get more involved than the massless case. We also arrive at some
analytical results using stationary phase approximation.
