Answers are grounded in this paper and cite their sources.
Analytic results for the ZHgg vertex are used to study the contribution of pp→ZH+X from gluon fusion, gg→ZH, at supercollider energies. Because of the destructive interference between the triangle and the box amplitude, gluon fusion is suppressed as compared to quark-antiquark annihilation, qq̄→ZH, unless the masses of both the top quark and the Higgs boson assume values close to their theoretical upper bounds.
No takes yet. Share an insight, caveat, or question.
Bernd A. Kniehl (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: