One-loop Integral Coefficients from Generalized Unitarity

Details One-loop Integral Coefficients from Generalized Unitarity One-loop Integral Coefficients from Generalized Unitarity

2007-11-30

arxiv.org/abs/0711.5015v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures

Scientific paper

I describe a method for determining the coefficients of scalar integrals for one-loop amplitudes in quantum field theory. The method is based upon generalized unitarity and the behavior of amplitudes when the free parameters of the cut momenta approach infinity. The method works for arbitrary masses of both external and internal legs of the amplitudes. It therefore applies not only to QCD but also to the Electroweak theory and to quantum field theory in general.

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