Single-minus gluon tree amplitudes are nonzero
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866910046924832768 |
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| author | Guevara, Alfredo Lupsasca, Alexandru Skinner, David Strominger, Andrew Weil, Kevin |
| author_facet | Guevara, Alfredo Lupsasca, Alexandru Skinner, David Strominger, Andrew Weil, Kevin |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_12176 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Single-minus gluon tree amplitudes are nonzero Guevara, Alfredo Lupsasca, Alexandru Skinner, David Strominger, Andrew Weil, Kevin High Energy Physics - Theory High Energy Physics - Phenomenology 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. |
| title | Single-minus gluon tree amplitudes are nonzero |
| topic | High Energy Physics - Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.12176 |