VVamp is hosted by Hepforge, IPPP Durham

VVamp project

This is the web page of the VVamp project. We provide the two-loop helicity amplitudes for electroweak vector boson pair production and their decay into 4 leptons in quark-antiquark annihilation and in gluon-gluon fusion.

You can download our analytical results for the master integrals and the amplitudes. Moreover, we provide C++ implementations for the fast and reliable numerical evaluation of the amplitudes.

Quark channel

Gluon channel

qq->VV Feynman diagram


gg->VV Feynman diagram


Reference

  • Thomas Gehrmann, Andreas von Manteuffel, Lorenzo Tancredi:
    "The two-loop helicity amplitudes for qq' -> V1V2 -> 4 leptons",
    arXiv:1503.04812

Reference

  • Andreas von Manteuffel, Lorenzo Tancredi:
    "The two-loop helicity amplitudes for gg -> V1V2 -> 4 leptons",
    arXiv:1503.08835

Downloads: amplitudes

Downloads: amplitudes

  • bare form factors exact in d: class A (Form format)
  • finite form factors in qt-scheme: class A (Form format)
  • relations for projectors: Pj of Tjdag (Form format)
  • numerical implementation of form factors: ggvvamp package (C++,
    requires GiNaC)

Downloads: master integrals