The S-Matrix of Gauge and Gravity Theories and The Two-Black Hole Problem
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Date
2020-10-01
Authors
Guevara, Alfredo
Advisor
Cachazo, Freddy
Journal Title
Journal ISSN
Volume Title
Publisher
University of Waterloo
Abstract
This thesis is devoted to diverse aspects of scattering amplitudes in gauge theory and gravity including interactions with matter particles. In Part I we focus on the applications of massive scattering amplitudes in gravity to the Black Hole two-body problem. For this we construct a classical limit putting especial emphasis on the multipole expansion of certain massive amplitudes, which we will use to model spinning black holes in a large distance effective regime or particle approximation. In Part II we study scattering amplitudes in six dimensions, and construct a compact formula analogous to the four-dimensional Witten-RSV/rational maps formulation. This provides a supersymmetric extension of moduli space localization formulae such as the CHY integral. We explore the cases of Super Yang-Mills and Maximal Supergravity theories, among others.