Abstract
A fully differential calculation of the next-to-leading order QCD corrections to the production of Z-boson pairs in association with a hard jet at the Tevatron and LHC is presented. This process is an important background for Higgs particle and new physics searches at hadron colliders. We find sizable corrections for cross sections and differential distributions, particularly at the LHC. Residual scale uncertainties are typically at the 10% level and can be further reduced by applying a veto against the emission of a second hard jet. Our results confirm that NLO corrections do not simply rescale LO predictions.
Highlights
Weak boson pair production at hadron colliders plays an essential part in the search for Higgs particles and for physics beyond the Standard Model (SM), since weak bosons can decay into jets, charged leptons or neutrinos and produce the same signatures as Higgs bosons, new coloured particles, new electroweak gauge bosons or dark matter candidates
We present first next-to-leading order (NLO) predictions for ZZj cross sections and differential distributions at the Tevatron and Large Hadron Collider (LHC) and compare them with the NLO results for W W j production given in Ref. [16]
The shape of the cross section variation at the LHC on the other hand is qualitatively unchanged when going from leading order (LO) to NLO
Summary
Weak boson pair production at hadron colliders plays an essential part in the search for Higgs particles and for physics beyond the Standard Model (SM), since weak bosons can decay into jets, charged leptons or neutrinos and produce the same signatures as Higgs bosons, new coloured particles, new electroweak gauge bosons or dark matter candidates. As a window to new physics ZZ production is interesting because of the absence of ZZγ and ZZZ couplings [9] in the SM Probing such anomalous neutral gauge boson couplings at hadron colliders has been studied in the literature [10]. Of particular interest is the production of weak boson pairs with one additional jet at NLO This process is interesting in its own right, due to the enhanced jet activity, at the LHC. It provides the real-virtual contribution to the next-to-nextto-leading order (NNLO) corrections to weak boson pair production. We present a calculation of the O(αs) corrections to Z-boson pair production with an additional jet at hadron colliders in the SM..
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