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Nonlinear couplings and tree amplitudes in gauge theories
Phys. Rev. D 53, 911 – Published 15 January, 1996
DOI: https://doi.org/10.1103/PhysRevD.53.911
Abstract
Following a remark advanced by Feynman, we study the connection between the form of the nonlinear vertices involving gauge particles and the Abelian gauge invariance of physical tree amplitudes. We show that this requirement, together with some natural assumptions, fixes uniquely the structure of the Yang-Mills theory. However, the constraints immposed by the above property are not sufficient to single out the gauge theory of gravitation. © 1996 The American Physical Society.
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