Split-Helicity Tree Amplitudes and Flag Cluster Algebras
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866912756903444480 |
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| author | Paranjape, Shruti Spradlin, Marcus Volovich, Anastasia Weng, He-Chen |
| author_facet | Paranjape, Shruti Spradlin, Marcus Volovich, Anastasia Weng, He-Chen |
| contents | Recent work has uncovered a connection between the symbol letters of general massless scattering and (permutations of) cluster variables of partial flag varieties. In this paper we explore the cluster adjacency of tree-level gluon amplitudes, specifically focusing on split-helicity amplitudes which can be written in closed form in terms of zigzag diagrams. We check in several cases, and conjecture in general, that the poles in each term satisfy cluster adjacency under a set of permutations that is built from arc permutations of the corresponding zigzag. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09704 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Split-Helicity Tree Amplitudes and Flag Cluster Algebras Paranjape, Shruti Spradlin, Marcus Volovich, Anastasia Weng, He-Chen High Energy Physics - Theory Recent work has uncovered a connection between the symbol letters of general massless scattering and (permutations of) cluster variables of partial flag varieties. In this paper we explore the cluster adjacency of tree-level gluon amplitudes, specifically focusing on split-helicity amplitudes which can be written in closed form in terms of zigzag diagrams. We check in several cases, and conjecture in general, that the poles in each term satisfy cluster adjacency under a set of permutations that is built from arc permutations of the corresponding zigzag. |
| title | Split-Helicity Tree Amplitudes and Flag Cluster Algebras |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2512.09704 |