4 papers
On-Shell Perspectives on the Massless Limit of Massive Supergravity
Daniel J Burger, Nathan Moynihan, Jeff Murugan
Massive gravity exhibits a famous discontinuity in its 2-point linearized amplitude for t-channel scattering of gravitational sources, in the limit. In essence, the sourc…
Rotating Black Holes in Cubic Gravity
Daniel J. Burger, William T. Emond, Nathan Moynihan
Using on-shell amplitude methods, we derive a rotating black hole solution in a generic theory of Einstein gravity with additional terms cubic in the Riemann tensor. We give an exp…
Amplitudes, Gravity and Classical Discontinuities
Daniel J. Burger, Raul Carballo-Rubio, Nathan Moynihan +2
On-shell methods have revitalized interest in scattering amplitudes which have, in turn, shed some much needed light on the structure of quantum field theories. These developments…
Towards the Raychaudhuri Equation Beyond General Relativity
Daniel J Burger, Saurya Das, S. Shajidul Haque +2
In General Relativity, gravity is universally attractive, a feature embodied by the Raychaudhuri equation which requires that the expansion of a congruence of geodesics is always n…