Electron impact inner-shell atomic ionization cross-section measurement
| Full text | |
| Author(s): |
Aprile, Francesco
;
Olivucci, Enrico
Total Authors: 2
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW D; v. 108, n. 12, p. 7-pg., 2023-12-21. |
| Abstract | |
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. (AU) | |
| FAPESP's process: | 19/24277-8 - Applications of quantum field theory |
| Grantee: | Pedro Gil Martins Vieira |
| Support Opportunities: | Research Projects - SPEC Program |