We report on a recent calculation of the full next-to-leading-order electroweak corrections to Z-boson pair production with subsequent decays into four charged leptons. Using the complete matrix elements at leading order and next-to-leading order in the electroweak coupling for the processes pp→μ+μ−e+e− and pp→μ+μ−μ+μ−, this includes all off-shell effects of intermediate massive vector bosons and photons. We employ a gauge-invariant splitting for the electroweak corrections into purely weak and photonic corrections. The latter show the well-known radiative tails near kinematical thresholds or resonances. The former are generically at the level of ∼−5% for the fiducial cross section and reach several −10% in the high-energy tails of distributions due to logarithms of electroweak origin. The impact of interference effects due to equal-flavour leptons in the final state can reach the order of 5% in off-shell-sensitive regions. Photon-induced contributions are included in our calculation, but turn out to be phenomenologically unimportant.
@article{arxiv.1707.01029,
title = {Full NLO electroweak corrections to Z-boson pair production at the Large Hadron Collider},
author = {Benedikt Biedermann},
journal= {arXiv preprint arXiv:1707.01029},
year = {2017}
}
Comments
Proceedings to the XXV International Workshop on Deep-Inelastic Scattering and Related Subjects, 3-7 April 2017, Birmingham, UK