Reducing full one-loop amplitudes to scalar integrals at the integrand level

  title={Reducing full one-loop amplitudes to scalar integrals at the integrand level},
  author={Giovanni Ossola and Costas G. Papadopoulos and R. Pittau},
We show how to extract the coefficients of the 4-, 3-, 2and 1-point one-loop scalar integrals from the full one-loop amplitude of arbitrary scattering processes. In a similar fashion, also the rational terms can be derived. Basically no information on the analytical structure of the amplitude is required, making our method appealing for an efficient numerical implementation. e-mail: e-mail: Permanent address: Dipartimento di Fisica Teorica… CONTINUE READING

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