Unstable Higgs Particle and the Equivalence Theorem

We consider the subtleties involved in the application of the Equivalence Theorem to the decay of an unstable Higgs particle. This is formally justified from consideration of unitarity and resonant elastic scattering of the stable decay prodiucts. By explicit perturbative calculation we find that the imaginary parts of the one-loop amplitudes for that decay… CONTINUE READING

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