Top quark contribution to two-loop helicity amplitudes for Z boson pair production in gluon fusion
2021; Springer Nature; Volume: 2021; Issue: 5 Linguagem: Inglês
10.1007/jhep05(2021)244
ISSN1127-2236
AutoresChristian Brønnum-Hansen, Chen-Yu Wang,
Tópico(s)Particle Accelerators and Free-Electron Lasers
ResumoA bstract We compute the top quark contribution to the two-loop amplitude for on-shell Z boson pair production in gluon fusion, gg → ZZ . Exact dependence on the top quark mass is retained. For each phase space point the integral reduction is performed numerically and the master integrals are evaluated using the auxiliary mass flow method, allowing fast computation of the amplitude with very high precision.
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