3 papers
hep-th2026
Quasi-Local Celestial Charges and Multipoles
Adam Kmec, Lionel Mason, Romain Ruzziconi
We extend Penrose's quasi-local mass definition to include higher-spin charges associated with the celestial symmetries and relate them to traditional definitions o…
hep-th2025
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…
hep-th2024
Celestial charges from a twistor action
Adam Kmec, Lionel Mason, Romain Ruzziconi +1
The celestial symmetries in asymptotically flat spacetimes have a natural geometric interpretation on twistor space in terms of Poisson diffeomorphisms. Using this…