We scrutinise the ability of the primary QED final-state resummation tools, combined with electroweak virtual corrections, to reproduce the exact next-to-leading order electroweak calculation in the four-charged-lepton final state. We further examine the dependence of the findings on the lepton-photon dressing-cone size as well as the resonance identification strategy. Overall we find excellent agreement with the fixed-order result, but partial differences not directly connected with resummation-induced higher-order effects at the few-percent level are observed in some cases, which are relevant for precision measurements.
@article{arxiv.2007.15360,
title = {Four lepton production and the accuracy of QED FSR},
author = {Christian Gütschow and Marek Schönherr},
journal= {arXiv preprint arXiv:2007.15360},
year = {2021}
}