Associated production of a Higgs boson decaying into bottom quarks and a weak vector boson decaying leptonically at NNLO in QCD

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Date
2019-10Type
- Journal Article
Citations
Cited 21 times in
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Cited 21 times in
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Abstract
We present the calculation of next-to-next-to-leading order (NNLO) corrections in perturbative QCD for the production of a Higgs boson decaying into a pair of bottom quarks in association with a leptonically decaying weak vector boson: pp→ VH + X→ ℓ ℓ ¯ b b ¯ + X. We consider the corrections to both the production and decay sub-processes, retaining a fully differential description of the final state including off-shell propagators of the Higgs and vector boson. The calculation is carried out using the antenna subtraction formalism and is implemented in the NNLOjet framework. Clustering and identification of b-jets is performed with the flavour-kt algorithm and results for fiducial cross sections and distributions are presented for the LHC at s = 13 TeV. We assess the residual theory uncertainty by varying the production and decay scales independently and provide scale uncertainty bands in our results, yielding percent-level accurate predictions for observables in this Higgs production mode computed at NNLO. Confronting a na¨ıve perturbative expansion of the cross section against the customary re-scaling procedure to a fixed branching ratio reveals that starting from NNLO, the latter could be inadequate in estimating missing higher-order effects through scale variations. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000372993Publication status
publishedExternal links
Journal / series
Journal of High Energy PhysicsVolume
Pages / Article No.
Publisher
SpringerSubject
NLO Computations; QCD PhenomenologyOrganisational unit
08833 - Gehrmann-De Ridder, Aude (Tit.-Prof.)
Funding
172478 - QCD effects in Higgs-strahlung at the LHC (SNF)
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Show all metadata
Citations
Cited 21 times in
Web of Science
Cited 21 times in
Scopus
ETH Bibliography
yes
Altmetrics