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$ZH$ production in gluon fusion: two-loop amplitudes with full top quark mass dependence

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arxiv 2011.12325 v3 pith:4SQV34JJ submitted 2020-11-24 hep-ph

classification hep-ph
keywords amplitudestwo-loopbosonfusiongluonproductionresultsamplitude
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We present results for the two-loop helicity amplitudes entering the NLO QCD corrections to the production of a Higgs boson in association with a $Z$-boson in gluon fusion. The two-loop integrals, involving massive top quarks, are calculated numerically. Results for the interference of the finite part of the two-loop amplitudes with the Born amplitude are shown as a function of the two kinematic invariants on which the amplitudes depend.

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Cited by 3 Pith papers

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

  1. Two-loop QCD corrections to $ZH$ and off-shell $Z$ boson pair production in gluon fusion

    hep-ph 2025-09 conditional novelty 6.0 of 10

    The paper provides fast, analytic two-loop virtual QCD corrections for gluon-induced ZH and off-shell ZZ production with full top-quark mass dependence, validated against numerical results at the sub-percent level.

  2. ggxy: Fast and flexible NLO QCD corrections to gluon-initiated processes

    hep-ph 2026-07 conditional novelty 5.0 of 10

    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...

  3. $CP$ violation in the $HZZ$ vertex and left-right asymmetries

    hep-ph 2025-01 conditional novelty 5.0 of 10

    Flavor-changing Z and Higgs couplings can induce CP-violating HZZ form factors up to about 10^-7, and a new asymmetry in Z* -> Z H is proposed to search for them.

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