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 language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Feb 26 2008|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)