4 papers
Relativistic partial waves for celestial amplitudes
Y. T. Albert Law, Michael Zlotnikov
The formalism of relativistic partial wave expansion is developed for four-point celestial amplitudes of massless external particles. In particular, relativistic partial waves are…
Massive Spinning Bosons on the Celestial Sphere
Y. T. Albert Law, Michael Zlotnikov
A natural extension of the Pasterski-Shao-Strominger (PSS) prescription is described, enabling the map of Minkowski space amplitudes with massive spinning external legs to the cele…
Poincaré Constraints on Celestial Amplitudes
Y. T. Albert Law, Michael Zlotnikov
The functional structure of celestial amplitudes as constrained by Poincaré symmetry is investigated in and -point cases for massless external particles of various spin,…
Celestial Amplitudes: Conformal Partial Waves and Soft Limits
Dhritiman Nandan, Anders Schreiber, Anastasia Volovich +1
Massless scattering amplitudes in four-dimensional Minkowski spacetime can be Mellin transformed to correlation functions on the celestial sphere at null infinity called celestial…