External leg corrections in the unitarity method
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Publication:2261456
DOI10.1007/JHEP01(2012)045zbMATH Open1306.81328arXiv1109.5106MaRDI QIDQ2261456
Author name not available (Why is that?)
Publication date: 6 March 2015
Published in: (Search for Journal in Brave)
Abstract: Unitarity cuts diverge in the channel of a single massive external fermion. We propose an off-shell continuation of the momentum that allows a finite evaluation of the unitarity cuts. If the cut is taken with complete amplitudes on each side, our continuation and expansion around the on-shell configuration produces the finite contribution to the bubble coefficient. Finite parts in the expansion of the external leg counterterms must be included explicitly as well.
Full work available at URL: https://arxiv.org/abs/1109.5106
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