CutTools: a program implementing the OPP reduction method to compute one-loop amplitudes

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  • 22 November 2007
Abstract
We present a program that implements the OPP reduction method to extract the coefficients of the one-loop scalar integrals from a user defined (sub)-amplitude or Feynman Diagram. Also the rational terms coming from the 4-dimensional part of the numerator are computed. Possible numerical instabilities are treated with the help of arbitrary precision routines, that activate only when needed.

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