ZZ production at the LHC: NNLO predictions for 2ℓ2ν and 4ℓ signatures
We consider QCD radiative corrections to ZZ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy (ℓℓ+ETmiss). All relevant fi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-11-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318307822 |
| Summary: | We consider QCD radiative corrections to ZZ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy (ℓℓ+ETmiss). All relevant final states are considered: ℓℓνℓνℓ, ℓℓνℓ′νℓ′ and ℓνℓℓ′νℓ′. We also study processes with four charged leptons: ℓℓℓℓ and ℓℓℓ′ℓ′. For the first time NNLO accuracy is achieved for a process mixing two double-resonant diboson topologies (ZZ/W+W−→ℓℓνℓνℓ). We find good agreement with ATLAS data at 8 TeV. NNLO corrections are large (5–20% and more), and interference effects between ZZ and W+W− resonances turn out to be negligible in most cases. |
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| ISSN: | 0370-2693 |