NLO QCD corrections to the production of tt̄Z in gluon fusion

Achilleas Lazopoulos*, Kirill Melnikov, Frank Petriello

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We compute the O(αs) QCD corrections to the partonic process gg→tt̄Z at the LHC. This partonic channel is the dominant component of the scattering process pp→tt̄Z, which will be important for measuring the tt̄Z electroweak couplings. We perform this calculation using a newly developed numerical technique for obtaining loop corrections. The O(αs) corrections increase the total cross section by up to 75% for reasonable choices of the renormalization and factorization scales. Inclusion of these contributions decreases the residual scale dependence of the cross section coming from uncalculated higher order terms to ±5%.

Original languageEnglish (US)
Article number034021
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number3
StatePublished - Feb 26 2008

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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