ZZ production at hadron colliders in NNLO QCD
Fabio CascioliPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandT. GehrmannPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandMassimiliano GrazziniPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandStefan KallweitPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandPhilipp MaierhöferPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandAndreas von ManteuffelPRISMA Cluster of Excellence, Institute of Physics, Johannes Gutenberg University, D-55099 Mainz, GermanyStefano PozzoriniPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandDirk RathlevPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandLorenzo TancrediPhysik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandErich WeihsPhysik-Institut, Universität Zürich, CH-8057 Zürich, Switzerland
2014en
ABI
Аннотация
We report on the first calculation of next-to-next-to-leading order (NNLO) QCD corrections to the inclusive production of Z-boson pairs at hadron colliders. Numerical results are presented for pp collisions with centre-of-mass energy (s) ranging from 7 to 14 TeV. The NNLO corrections increase the NLO result by an amount varying from 11% to 17% as s goes from 7 to 14 TeV. The loop-induced gluon fusion contribution provides about 60% of the total NNLO effect. When going from NLO to NNLO the scale uncertainties do not decrease and remain at the ±3% level.
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