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Integral coefficients for one-loop amplitudes
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DOI：10.1088/1126-6708/2008/02/095.png)
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Abstract
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We present a set of algebraic functions for evaluating the coefficients of the scalar integral basis of a general one-loop amplitude. The functions are derived from unitarity cuts, but the complete cut-integral procedure has been carried out in generality so that it never needs to be repeated. Where the master integrals are known explicitly, the results here can be used as a black box with tree-level amplitudes as input and one-loop amplitudes as output.
Keywords:
NLO computations
QCD
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