SciPost Submission Page
Geometry and causality for efficient multiloop representations
by German F. R. Sborlini
Submission summary
| Authors (as registered SciPost users): | German Sborlini |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2109.07808v1 (pdf) |
| Date accepted: | Feb. 8, 2022 |
| Date submitted: | Sept. 17, 2021, 11:21 a.m. |
| Submitted by: | German Sborlini |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 15th International Symposium on Radiative Corrections: Applications of Quantum Field Theory to Phenomenology (RADCOR2021) |
| Ontological classification | |
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| Academic field: | Physics |
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| Approach: | Theoretical |
Abstract
Multi-loop scattering amplitudes constitute a serious bottleneck in current high-energy physics computations. Obtaining new integrand level representations with smooth behaviour is crucial for solving this issue, and surpassing the precision frontier. In this talk, we describe a new technology to rewrite multi-loop Feynman integrands in such a way that non-physical singularities are avoided. The method is inspired by the Loop-Tree Duality (LTD) theorem, and uses geometrical concepts to derive the causal structure of any multi-loop multi-leg scattering amplitude. This representation makes the integrand much more stable, allowing faster numerical simulations, and opens the path for novel re-interpretations of higher-order corrections in QFT.
Published as SciPost Phys. Proc. 7, 047 (2022)
German Sborlini on 2021-11-27 [id 1982]
We thank the referee for the positive report.