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The two-loop helicity amplitudes for formula presented.)leptons

Gehrmann, T.; Manteuffel, A.von; Tancredi, L.

We compute the two-loop massless QCD corrections to the helicity amplitudes for the production of two massive vector bosons in quark-antiquark annihilation, allowing for an arbitrary virtuality of the vector bosons: q q ¯ ′ → V 1 V 2 qq¯′→V1V2 . Combining with the leptonic decay currents, we obtain the full two-loop QCD description of the corresponding electroweak four-lepton production processes. The calculation is performed by projecting the two-loop diagrams onto an appropriate basis of Lorentz structures. All two-loop Feynman integrals are reduced to a basis of master integrals, which are then computed using the differential equations method and optimised for numerical performance. We provide a public C++ code which allows for fast and precise numerical evaluations of the amplitudes.

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DOI: 10.5445/IR/1000050906
DOI: 10.1007/JHEP09(2015)128
Zitationen: 25
Web of Science
Zitationen: 31
Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1126-6708
KITopen-ID: 1000050906
Erschienen in Journal of High Energy Physics
Band 2015
Heft 9
Seiten 128
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Scopus
Web of Science
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