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arxiv: hep-ph/0612277 · v2 · pith:5LPYQX2Snew · submitted 2006-12-21 · ✦ hep-ph · hep-th

Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes

Charalampos Anastasiou , Ruth Britto , Bo Feng , Zoltan Kunszt , Pierpaolo Mastrolia This is my paper
classification ✦ hep-ph hep-th
keywords reductionamplitudesintegralsmasterdimensionsone-loopstepunitarity
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We present an alternative reduction to master integrals for one-loop amplitudes using a unitarity cut method in arbitrary dimensions. We carry out the reduction in two steps. The first step is a pure four-dimensional cut-integration of tree amplitudes with a mass parameter, and the second step is applying dimensional shift identities to master integrals. This reduction is performed at the integrand level, so that coefficients can be read out algebraically.

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