2015/07/31 by Shen Yong-Bai, Zhang Ren-You, Ma Wen-Gan +3
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Coupling (piping) #Electroweak interaction #Gauge boson #Large Hadron Collider #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quartic function #Standard Model (mathematical formulation) #Vector boson #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep10(2015)186
published as JHEP 10 (2015) 186 · 19 pages, 8 figures
openalex publication_date 2015/10/01 · openalex created_date 2016/06/24 · arxiv created 2016/11/05 · arxiv updated 2016/11/08 · openalex updated_date 2026/08/06
Precision tests of the Standard Model (SM) require not only accurate experiments, but also precise and reliable theoretical predictions. Triple vector boson production provides a unique opportunity to investigate the quartic gauge couplings and check the validity of the gauge principle in the SM. Since the tree-level predictions alone are inadequate to meet this demand, the next-to-leading order (NLO) calculation becomes compulsory. In this paper, we calculate the NLO QCD + NLO electroweak (EW) corrections to the W ± ZZ productions with subsequent leptonic decays at the 14 TeV LHC by adopting an improved narrow width approximation which takes into account the off-shell contributions and spin correlations from the W ±- and Z-boson leptonic decays. The NLO QCD+EW corrected integrated cross sections for the W ± ZZ productions and some kinematic distributions of final products are provided. The results show that both the NLO QCD and NLO EW corrections are significant. In the jet-veto event selection scheme with p ,jet cut = 50 GeV, the NLO QCD+EW relative corrections to the integrated cross section are 20.5% and 31.1%, while the genuine NLO EW relative corrections are −5.42% and −4.58%, for the W + ZZ and W − ZZ productions, respectively. We also investigate the theoretical dependence of the integrated cross section on the factorization/renormalization scale, and find that the scale uncertainty is underestimated at the LO due to the fact that the strong coupling α s is not involved in the LO matrix elements.