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The trace amplitude method and its application to the NLO QCD calculation

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arxiv 2101.01106 v1 pith:4UFOVZCE submitted 2021-01-04 hep-ph

The trace amplitude method and its application to the NLO QCD calculation

classification hep-ph
keywords methodamplitudeapplicationcalculationstraceamplitudesanalyticallyanalyzing
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The trace amplitude method (TAM) provides us a straightforward way to calculate the helicity amplitudes with massive fermions analytically. In this work, we review the basic idea of this method, and then discuss how it can be applied to next-to-leading order (NLO) quantum chromodynamics (QCD) calculations, which has not been explored before. By analyzing the singularity structures of both virtual and real corrections, we show that the TAM can be generalized to NLO QCD calculations straightforwardly, the only caution is that the unitarity should be guaranteed. We also present a simple example to demonstrate the application of this method.

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