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hep-th2026
Gluons and Knots
Alfredo Guevara
We argue that the scattering amplitude of a single minus helicity gluon with arbitrarily many positive helicity gluons is topological. The amplitude is constant in chambers of kine…
hep-th2026
Single-Minus Graviton Amplitudes from Matrix Theory
Alfredo Guevara, Alexandru Lupsasca, Juan Maldacena +1
The -point single-minus graviton amplitudes are nonzero in a special kinematic region that preserves some supersymmetry when embedded in supergravity. We compute these amplitude…
hep-th2026
Single-minus graviton tree amplitudes are nonzero
Alfredo Guevara, Alexandru Lupsasca, David Skinner +2
Single-minus tree-level -graviton scattering amplitudes are revisited. Often presumed to vanish, they are shown here to be nonvanishing for certain "half-collinear" configuratio…