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

Sep, 2006
22 pages
Published in:
  • Nucl.Phys.B 763 (2007) 147-169
e-Print:

Citations per year

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Abstract: (Elsevier)
We show how to extract the coefficients of the 4-, 3-, 2- and 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.
  • Feynman graph
  • scattering amplitude
  • n-point function