======  TTP21-002 Top quark contribution to two-loop helicity amplitudes for $Z$ boson pair production in gluon fusion  ======

^ TTP21-002 Top quark contribution to two-loop helicity amplitudes for $Z$ boson pair production in gluon fusion ^
| **Christian Brønnum-Hansen and Chen-Yu Wang** | 
|**    JHEP 05 (2021) 244**|
| {{preprints:2021:ttp21-002.pdf|PDF}}  [[http://arxiv.org/abs/2101.12095|arXiv]] | 
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