Top quark contribution to two-loop helicity amplitudes for Z boson pair production in gluon fusion

A 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 evalua...

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Bibliographic Details
Published in:The journal of high energy physics 2021-05, Vol.2021 (5), p.1-16, Article 244
Main Authors: Brønnum-Hansen, Christian, Wang, Chen-Yu
Format: Article
Language:English
Subjects:
Amplitudes
Classical and Quantum Gravitation
Elementary Particles
Gluons
Helicity
High energy physics
Integrals
Mass flow
Pair production
Perturbative QCD
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Regular Article - Theoretical Physics
Relativity Theory
Scattering Amplitudes
String Theory
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Summary:A 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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2021)244