5 papers
Surprising one-loop finiteness of 6D half-maximal supergravities
Yu-tin Huang, Henrik Johansson, Michele Santagata +1
In four dimensions, it has long been established that gravity coupled to matter exhibits ultraviolet divergences at one loop, irrespective of supersymmetry. Notably, the four-matte…
Kerr worldline-QFT action from Compton amplitude to infinite spin orders
Maor Ben-Shahar, Lucile Cangemi, Henrik Johansson
We develop a quadratic-in-Riemann worldline action for a Kerr black hole at infinite spin orders by matching to a proposed tree-level Kerr Compton amplitude, originally obtained fr…
Binary Kerr black-hole scattering at 2PM from quantum higher-spin Compton
Lara Bohnenblust, Lucile Cangemi, Henrik Johansson +1
Quantum higher-spin theory applied to Compton amplitudes has proven to be surprisingly useful for elucidating Kerr black hole dynamics. Here we apply the framework to compute scatt…
Gleaning gravitational amplitudes -- a double copy for canceling dilatons
Henrik Johansson, Ingrid Vazquez-Holm
Scattering amplitudes in general relativity can be conveniently computed using the double copy, which relates them to Yang-Mills amplitudes. However, unwanted dilatons are sourced…
Compton Amplitude for Rotating Black Hole from QFT
Lucile Cangemi, Marco Chiodaroli, Henrik Johansson +3
We construct a candidate tree-level gravitational Compton amplitude for a rotating Kerr black hole, for any quantum spin s=0,1/2,1,...,, from which we extract the correspon…