Effects of Amplitude Nullification in the Standard Model

Details Effects of Amplitude Nullification in the Standard Model Effects of Amplitude Nullification in the Standard Model

1993-09-06

arxiv.org/abs/hep-ph/9309231v1

Phys.Rev. D49 (1994) 1081-1085

Physics

High Energy Physics

High Energy Physics - Phenomenology

10, 10 pages

Scientific paper

10.1103/PhysRevD.49.1081

Delicate cancellations among diagrams can result in the vanishing of threshold amplitudes in the standard model. This phenomenon is investigated for multi-Higgs production by scalar, vector, and fermionic fields. A surprising gap is found where although the tree-level amplitude for $2$ incoming gauge bosons to produce $N_v$ particle may vanish, the amplitude for the production of $N_{v}+1$ particles is nonzero.

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