6 papers
Higher-spin self-dual gravity from holomorphic planes in twistor space
Nicolas Boulanger, Yannick Herfray, Lionel Mason +1
We prove a `nonlinear graviton theorem' for higher-spin self-dual gravity. We consider small deformations of the complex structure of the non-projective twistor space that are boun…
Graviton scattering on self-dual black holes
Tim Adamo, Giuseppe Bogna, Lionel Mason +1
The computation of gravitational wave scattering on black hole spacetimes is an extremely hard problem, typically requiring approximation schemes that either treat the black hole p…
The Self-Duality Equations on a Riemann Surface and Four-Dimensional Chern-Simons Theory
Roland Bittleston, Lionel Mason, Seyed Faroogh Moosavian
We construct a Lagrangian formulation of Hitchin's self-duality equations on a Riemann surface using potentials for the connection and Higgs field. This two-dimensional action…
S-algebra in Gauge Theory: Twistor, Spacetime and Holographic Perspectives
Adam Kmec, Lionel Mason, Romain Ruzziconi +1
The celestial -algebra arose from a reinterpretation of collinear limits of the Yang-Mills S-matrix as OPEs in celestial holography. It was subsequently represented via asymptot…
Chiral higher-spin theories from twistor space
Lionel Mason, Atul Sharma
We reformulate chiral higher-spin Yang-Mills and gravity on as 'CR-holomorphic' theories of Chern-Simons type; in the most general case, these are Moyal deformed to…
Scattering on self-dual Taub-NUT
Tim Adamo, Giuseppe Bogna, Lionel Mason +1
We derive exact solutions of massless free field equations and tree-level two-point amplitudes up to spin 2 on self-dual Taub-NUT space-time, as well as on its single copy, the sel…