TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.7.047
TI  - Geometry and causality for efficient multiloop representations
PY  - 2022/06/22
UR  - https://scipost.org/SciPostPhysProc.7.047
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 7
SP  - 047
A1  - Sborlini, German
AB  - 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.
ER  -

@Article{10.21468/SciPostPhysProc.7.047,
	title={{Geometry and causality for efficient multiloop representations}},
	author={German F. R. Sborlini},
	journal={SciPost Phys. Proc.},
	pages={047},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.7.047},
	url={https://scipost.org/10.21468/SciPostPhysProc.7.047},
}