Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in quark-antiquark collisions
arXiv:1408.6409 · doi:10.1007/JHEP11(2014)041
Abstract
Knowledge of two-loop QCD amplitudes for processes $q\bar q \to V_1 V_2 \to (l_1\bar l'_1)(l_2 \bar l'_2)$ is important for improving the theoretical description of four-lepton production in hadron collisions. In this paper we compute these helicity amplitudes for all intermediate vector bosons, $V_1 V_2 = γ^*γ^*, WW, ZZ, WZ, W γ^*$, including off-shell effects and decays to leptons.
20 pages, 3 tables, 3 figures. v2: tab. 3 and fig. 3 corrected