Virtual QCD corrections to $gg \to ZZ$: top-quark loops from a transverse-momentum expansion

Giuseppe Degrassi; Marco Vitti; Ramona Gr\"ober

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arxiv 2404.15113 v1 pith:TVEPF6B6 submitted 2024-04-23 hep-ph

Virtual QCD corrections to gg to ZZ: top-quark loops from a transverse-momentum expansion

Giuseppe Degrassi , Ramona Gr\"ober , Marco Vitti This is my paper

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keywords expansioncorrectionsloopsorderresultstop-quarkvirtualallow

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We present the virtual corrections due to the top-quark loops for the process $gg \to ZZ$ at next-to-leading order in QCD. The associated two-loop box diagrams are computed using a small-transverse-momentum expansion. Our results are then merged with those available in the complementary energy region, obtained via a high-energy expansion, in order to provide an analytic result that is valid in the whole phase space. The results presented allow for an efficient modelling of the signal--background interference as well as the irreducible background in off-shell Higgs production.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

ggxy: Fast and flexible NLO QCD corrections to gluon-initiated processes
hep-ph 2026-07 conditional novelty 5.0

The ggxy library implements NLO QCD corrections for gg→ZH and gg→ZZ with full top-quark mass dependence using high-energy and forward-limit expansions, validated against existing results and interfaced to POWHEG for p...