Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in quark-antiquark collisions
- Caola, FabrizioInstitute for Theoretical Particle Physics, KIT, Karlsruhe, Germany
- Henn, Johannes(Institute for Advanced Study, Princeton, NJ, 08540, U.S.A.)
- Melnikov, Kirill(Institute for Theoretical Particle Physics, KIT, Karlsruhe, Germany)
- Smirnov, Alexander(Scientific Research Computing Center, Moscow State University, 119991, Moscow, Russia)
- Smirnov, Vladimir(Skobeltsyn Institute of Nuclear Physics of Moscow State University, 119991, Moscow, Russia)
Publication date
November 2014
DOIAbstract
Knowledge of two-loop QCD amplitudes for processes q q ′ → V 1 V 2 → l 1 l ¯ 1 ′ l 2 l ¯ 2 ′ $$ qq^{\prime}\to {V}_1{V}_2\to \left({l}_1{\overline{l}}_1^{\prime}\right)\left({l}_2{\overline{l}}_2^{\prime}\right) $$ 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 * , W + W − , ZZ , W ± Z , W ± γ * , including off-shell effects and decays to leptons
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