135 citations · 222 across the 5 of their papers we have counts for
4 papers · 1 filter
Enumerating higher-dimensional operators with on-shell amplitudes
Gauthier Durieux, Camila S. Machado
We establish a simple formula for the minimal dimension of operators leading to any helicity amplitude. It eases the systematic enumeration of independent operators from the constr…
Gravitational wave probes of axion-like particles
Camila S. Machado, Wolfram Ratzinger, Pedro Schwaller +1
We have recently shown that axions and axion-like particles (ALPs) may emit an observable stochastic gravitational wave (GW) background when they begin to oscillate in the early un…
The Super-Planckian Axion Strikes Back
Nayara Fonseca, Benedict von Harling, Leonardo de Lima +1
We present a novel framework for obtaining large hierarchies in axion decay constants as well as trans-Planckian field excursions, with no need for tuning or a large number of fiel…
The Rise of SMEFT On-shell Amplitudes
Rafael Aoude, Camila S. Machado
We present a map between the tree-level Standard Model Effective Theory (SMEFT) in the Warsaw basis and massive on-shell amplitudes. As a first step, we focus on the electroweak se…