Work

Single-minus gluon tree amplitudes are nonzero

Year: 2026

Type: preprint

Abstract: Single-minus tree-level $n$-gluon scattering amplitudes are reconsidered. Often presumed to vanish, they are shown here to be nonvanishing for certain "half-collinear" configurations existing in Klein space or for complexified momenta. We derive a piecewise-constant closed-form expression for the decay of a single minus-helicity gluon into $n-1$ plus-helicity gluons as a function of their momenta. This formula nontrivially satisfies multiple consistency conditions including Weinberg's soft theorem.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2602.12176

Authors: Guevara, Alfredo, Lupsasca, Alexandru, Skinner, David, Strominger, Andrew, Weil, Kevin

Institutions: Institute for Advanced Study, Vanderbilt University, OpenAI (United States), University of Cambridge, Harvard University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Science Foundation Ireland, Science and Technology Facilities Council

Awards: G1222841564, Quantum Fields, Quantum Gravity and Quantum Particles, PROBLEMS IN THEORETICAL PHYSICS, Collaborative Research: Experimental General Relativity using Radio Interferometry of a Black Hole Photon Ring, G6671297155, CAREER: Exploring the Photon Ring and Broadening Participation in Relativity via Interactive Black Hole Visualizations

OpenAlex ID: W7128819822

Cites:

Cited by: 2

Related to: 10