TY - JOUR
T1 - NLO QCD corrections to the production of tt̄Z in gluon fusion
AU - Lazopoulos, Achilleas
AU - Melnikov, Kirill
AU - Petriello, Frank
PY - 2008/2/26
Y1 - 2008/2/26
N2 - 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%.
AB - 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%.
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U2 - 10.1103/PhysRevD.77.034021
DO - 10.1103/PhysRevD.77.034021
M3 - Article
AN - SCOPUS:41049107854
SN - 1550-7998
VL - 77
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 3
M1 - 034021
ER -