Lecture notes prepared for the 2021 SAGEX PhD School in Amplitudes hosted by the
University of Copenhagen August 10th through 13th. Topics covered include: the …

The purpose of this review is to bridge the gap between a standard course in quantum field
theory and recent fascinating developments in the studies of on-shell scattering amplitudes …

Using the spinning worldline quantum field theory formalism we calculate the quadratic-in-
spin momentum impulse Δ pi μ and spin kick Δ ai μ from a scattering of two arbitrarily …

A bstract We exhibit an initial-value formulation of the worldline quantum field theory (WQFT)
approach to the classical two-body problem in general relativity. We show that the …

A bstract Picture yourself in the wave zone of a gravitational scattering event of two massive,
spinning compact bodies (black holes, neutron stars or stars). We show that this system of …

A bstract We introduce a formalism for describing four-dimensional scattering amplitudes for
particles of any mass and spin. This naturally extends the familiar spinor-helicity formalism …

Gravity in 4 d asymptotically flat spacetime constitutes the archetypal example of a
gravitational system with leaky boundary conditions. Pursuing our previous analysis of …

Using the spinning, supersymmetric worldline quantum field theory formalism we compute
the momentum impulse and spin kick from a scattering of two spinning black holes or …

Providing a comprehensive, pedagogical introduction to scattering amplitudes in gauge
theory and gravity, this book is ideal for graduate students and researchers. It offers a …

We compute the next-to-leading-order QCD corrections to the production of two Z-bosons in
the annihilation of two gluons at the LHC. Being enhanced by a large gluon flux, these …