Four-dimensional unsubtraction from the loop-tree duality

@article{Sborlini2016FourdimensionalUF,
  title={Four-dimensional unsubtraction from the loop-tree duality},
  author={German F. R. Sborlini and F{\'e}lix Driencourt-Mangin and Roger J. Hern{\'a}ndez-Pinto and Germ{\'a}n Rodrigo},
  journal={Journal of High Energy Physics},
  year={2016},
  volume={2016},
  pages={1-42}
}
A bstractWe present a new algorithm to construct a purely four dimensional representation of higher-order perturbative corrections to physical cross-sections at next-to-leading order (NLO). The algorithm is based on the loop-tree duality (LTD), and it is implemented by introducing a suitable mapping between the external and loop momenta of the virtual scattering amplitudes, and the external momenta of the real emission corrections. In this way, the sum over degenerate infrared states is… 
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