Masses, fermions and generalized D-dimensional unitarity
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Date
2009-11-21
Publication Type
Journal Article
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yes
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Abstract
We extend the generalized D-dimensional unitarity method for numerical evaluation of one-loop amplitudes by incorporating massive particles. The issues related to extending the spinor algebra to higher dimensions, treatment of external self-energy diagrams and mass renormalization are discussed within the context of the D-dimensional unitarity method. To validate our approach, we calculate in QCD the one-loop scattering amplitudes of a massive quark pair with up to three additional gluons for arbitrary spin states of the external quarks and gluons.
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Publication status
published
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Journal / series
Volume
822 (1-2)
Pages / Article No.
270 - 282
Publisher
Elsevier