2026-06-27T22:30:26Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/1020202024-05-24T14:26:08Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Aprile, Francesco
author
Olivucci, Enrico
2024-03-06T19:41:10Z
2024-03-06T19:41:10Z
2023-12-21
2470-0010
10.1103/PhysRevD.108.L121902
https://hdl.handle.net/20.500.14352/102020
2470-0029
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.108.L121902
We study fishnet Feynman diagrams defined by a certain triangulation of a planar n-gon, with massless scalars propagating along and across the cuts. Our solution theory uses the technique of separation of variables, in combination with the theory of symmetric polynomials and Mellin space. The n-point splitladders are solved by a recursion where all building blocks are made fully explicit. In particular, we find an elegant formula for the coefficient functions of the light-cone leading logs. When the diagram grows into a fishnet, we obtain new results exploiting a Cauchy identity decomposition of the measure over separated variables. This leads to an elementary proof of the Basso-Dixon formula at 4-points, while at n-points it provides a natural operator product expansion-like stratification of the diagram. Finally, we propose an independent approach based on "stampede" combinatorics to study the light-cone behavior of the diagrams as the partition function of a certain vertex model.
eng
Attribution 4.0 International
Multipoint fishnet Feynman diagrams: Sequential splitting
journal article
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URL
https://docta.ucm.es/bitstreams/edfb24d1-9839-42d6-9934-061a9d229f5e/download
File
MD5
e778b69eb19bbcdbeee179e763314d4c
513564
application/pdf
PhysRevD.108.L121902.pdf