82 citations · 274 across the 16 of their papers we have counts for
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Celestial Feynman Rules for Scalars
Walker Melton
Off-shell celestial amplitudes with both time-like and space-like external legs are defined. The Feynman rules for scalar amplitudes, viewed as a set of recursion relations for off…
Conformal Block Expansion in Celestial CFT
Alexander Atanasov, Walker Melton, Ana-Maria Raclariu +1
The 4D 4-point scattering amplitude of massless scalars via a massive exchange is expressed in a basis of conformal primary particle wavefunctions. This celestial amplitude is expa…
Eigenstates of Quasi-Keplerian Self-Gravitating Particle Discs
Walker Melton, Konstantin Batygin
Although quasi-Keplerian discs are among the most common astrophysical structures, computation of secular angular momentum transport within them routinely presents a considerable p…
Scattering and the Celestial Torus
Alexander Atanasov, Adam Ball, Walker Melton +2
Analytic continuation from Minkowski space to split signature spacetime has proven to be a powerful tool for the study of scattering amplitudes. Here we show that, under th…