Freddy Cachazo co-developed the scattering equations with Song He and Ellis Ye Yuan. Their work connected kinematic invariants with punctures on a sphere and provided an inductive solution method, together with a proof of KLT orthogonality.[ref]
The resulting auxiliary geometry organizes calculations of massless-particle scattering without treating that sphere as physical spacetime.
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Freddy Cachazo does not appear to be a widely recognized figure or term in public knowledge as of my last update in October 2023. It's possible that it could refer to a lesser-known individual, a character, or an emerging topic that hasn't gained significant attention in mainstream media or literature.