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July 5, 2026The European Physical Journal COpen Access

MC@NLO event generation by reweighting unweighted born events

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Authors

SFS. El FarkhRFRikkert FrederixMGM. Gouighri

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Overview

Randomized trial explores NLO event generation efficiency in LHC processes, suggesting improved weight handling.

Key Points

  • The aim is to develop a method for NLO event generation that improves accuracy and reduces weight variability.
  • Develop a computational strategy for NLO + PS simulations using born-accurate events and reweighting them.
  • Validate the method on two LHC processes and compare it to direct NLO generation in MC@NLO and MC@NLO-Δ,”Employ large folding values in radiative variables to stabilize integral and lower negative weight fraction.
  • Reduced weight variance and negative weights in NLO event generation when using the new reweighting strategy.
  • Comparable wall-clock time when compared to standard S-event generation and unweighting under fixed precision.
  • Evident improvements in the weight handling compared to S-event generation without folding.

Cite This Study

Farkh et al. (2026) studied this question.

synapsesocial.com/papers/6a49f754f5d1d45b288013f5https://doi.org/10.1140/epjc/s10052-026-16034-y
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