A factorisation-aware Matrix element emulator

Maître, Daniel; Truong, Henry

Abstract

In this article we present a neural network based model to emulate matrix elements. This model improves on existing methods by taking advantage of the known factorisation properties of matrix elements. In doing so we can control the behaviour of simulated matrix elements when extrapolating into more singular regions than the ones used for training the neural network. We apply our model to the case of leading-order jet production in e+e− collisions with up to five jets. Our results show that this model can reproduce the matrix elements with errors below the one-percent level on the phase-space covered during fitting and testing, and a robust extrapolation to the parts of the phase-space where the matrix elements are more singular than seen at the fitting stage.

Citation

Maître, D., & Truong, H. (2021). A factorisation-aware Matrix element emulator. Journal of High Energy Physics, 2021(11), Article 066. https://doi.org/10.1007/jhep11%282021%29066

• Journal Article Type: Article
• Acceptance Date: Oct 18, 2021
• Online Publication Date: Nov 10, 2021
• Publication Date: 2021-11
• Deposit Date: Oct 29, 2021
• Publicly Available Date: Jan 24, 2022
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2021
• Issue: 11
• Article Number: 066
• DOI: https://doi.org/10.1007/jhep11%282021%29066
• Public URL: https://durham-repository.worktribe.com/output/1224179
• Related Public URLs: https://arxiv.org/pdf/2107.06625.pdf