TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCommRep.4
TI  - LHC EFT WG note: SMEFT predictions, event reweighting, and simulation
PY  - 2024/11/29
UR  - https://scipost.org/SciPostPhysCommRep.4
JF  - SciPost Physics Community Reports
JA  - SciPost Phys. Comm. Rep.
SP  - 4
A1  - Belvedere, Alberto
AU  - Bhattacharya, Saptaparna
AU  - Boldrini, Giacomo
AU  - Chatterjee, Suman
AU  - Calandri, Alessandro
AU  - Sánchez Cruz, Sergio
AU  - Dickinson, Jennet
AU  - Glessgen, Franz Jacob
AU  - Goldouzian, Reza
AU  - Grohsjean, Alexander
AU  - Jeppe, Laurids
AU  - Knight, Charlotte
AU  - Mattelaer, Olivier
AU  - Mohrman, Kelci
AU  - Nelson, Hannah
AU  - Perovic, Vasilije
AU  - Presilla, Matteo
AU  - Schoefbeck, Robert
AU  - Smith, Nick
AB  - This note provides a comprehensive overview of tools for predicting observables in the Standard Model effective field theory (SMEFT) at both tree level and one loop using event generators. We evaluate three primary methodologies–event reweighting, separate simulation of squared matrix elements, and full SMEFT process simulation–focusing on their statistical performance, computational efficiency, and potential biases. Each approach is assessed in terms of its accuracy, highlighting trade-offs between precision and resource demands. Practical insights into their applicability for high-energy physics analyses are offered, with particular attention to processes where SMEFT effects are significant. Additionally, we discuss the role of helicity in reweighting strategies and its impact on the quality of predictions. By comparing the methods across various LHC processes, this note provides guidance for selecting the most effective strategy for various SMEFT studies, ensuring robust predictions while optimizing computational resources.
ER  -

@Article{10.21468/SciPostPhysCommRep.4,
	title={{LHC EFT WG note: SMEFT predictions, event reweighting, and simulation}},
	author={Alberto Belvedere and Saptaparna Bhattacharya and Giacomo Boldrini and Suman Chatterjee and Alessandro Calandri and Sergio Sánchez Cruz and Jennet Dickinson and Franz J. Glessgen and Reza Goldouzian and Alexander Grohsjean and Laurids Jeppe and Charlotte Knight and Olivier Mattelaer and Kelci Mohrman and Hannah Nelson and Vasilije Perovic and Matteo Presilla and Robert Schoefbeck and Nick Smith},
	journal={SciPost Phys. Comm. Rep.},
	pages={4},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCommRep.4},
	url={https://scipost.org/10.21468/SciPostPhysCommRep.4},
}