Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in quark-antiquark collisions

2014/08/31 by Fabrizio Caola, Johannes M. Henn, Kirill Melnikov +2 · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1007/jhep11(2014)041

20 pages, 3 tables, 3 figures. v2: tab. 3 and fig. 3 corrected

arxiv created 2015/03/18 · arxiv updated 2015/06/22

Abstract

Knowledge of two-loop QCD amplitudes for processes q q → V₁ V₂ → (l₁ l'₁)(l₂ 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, V₁ V₂ = γ^*γ^*, WW, ZZ, WZ, W γ^*, including off-shell effects and decays to leptons.

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