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Contribution of third generation quarks to two-loop helicity amplitudes for W boson pair production in gluon fusion

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arxiv 2009.03742 v1 pith:7UG7TWBX submitted 2020-09-08 hep-ph

classification hep-ph
keywords amplitudebosoncontributionfusiongenerationgluonpairproduction
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abstract

We compute the contribution of third generation quarks ($t,\ b$) to the two-loop amplitude for on-shell $W$ boson pair production in gluon fusion $gg \to WW$. We present plots for the amplitude across partonic phase space as well as reference values for two kinematic points. The master integrals are efficiently evaluated by numerically solving a system of ordinary differential equations.

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  1. Theoretical modeling of QCD radiation in off-shell Higgs production through gluon fusion

    hep-ph 2025-06 conditional novelty 6.0 of 10

    A controlled three-generator comparison shows that NLO+PS and LO jet merging differ by up to a factor of two in off-shell gg to H to ZZ to 4l predictions, with MadGraph underproducing sub-leading jets.

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