303 citations · 1.4k across the 24 of their papers we have counts for
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Planar Matrices and Arrays of Feynman Diagrams
Freddy Cachazo, Alfredo Guevara, Bruno Umbert +1
Very recently planar collections of Feynman diagrams were proposed by Borges and one of the authors as the natural generalization of Feynman diagrams for the computation of b…
A Soft Theorem for the Tropical Grassmannian
Diego García Sepúlveda, Alfredo Guevara
We study the soft limit of a recently proposed generalization of the biadjoint scalar amplitudes , which have been conjectured to have a relation to the tropical Grass…
On the Double Copy for Spinning Matter
Yilber Fabian Bautista, Alfredo Guevara
We explore various tree-level double copy constructions for amplitudes including massive particles with spin. By working in general dimensions, we use that particles with spins $s\…
Notes on Conformal Soft Theorems and Recursion Relations in Gravity
Alfredo Guevara
Celestial amplitudes are flat-space amplitudes which are Mellin-transformed to correlators living on the celestial sphere. In this note we present a recursion relation, based on a…
Black-hole scattering with general spin directions from minimal-coupling amplitudes
Alfredo Guevara, Alexander Ochirov, Justin Vines
We study the link between classical scattering of spinning black holes and quantum amplitudes for massive spin- particles. Generic spin orientations of the black holes are consi…
From Scattering Amplitudes to Classical Physics: Universality, Double Copy and Soft Theorems
Yilber Fabian Bautista, Alfredo Guevara
We introduce a covariant Multipole Expansion for the scattering of a massive particle emitting photons or gravitons in dimensions. We find that these amplitudes exhibit very po…