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Test of an Equivalence Theorem at One-Loop

M. S. Berger

hep-pharXiv:hep-ph/9207275

Abstract

We show that the equivalence theorem approximating one-loop gauge sector diagrams by including only Goldstone bosons in the loop gives a remarkably poor approximation to the amplitude for the decay H→ γγ and for the process γγ→ HH. At one loop, large logarithms can arise that evade power counting arguments.

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