Loop-tree duality allows to express virtual contributions in terms of phase-space integrals, thus leading to a direct comparison with real radiation terms. In this talk, we review the basis of the method and describe its application to regularize Feynman integrals. Performing an integrand-level combination of real and virtual terms, we obtain finite contributions that can be computed in four-dimensions. Moreover, this method provides a natural physical interpretation of infrared singularities, their origin and the way that they cancel in the complete computation.
@article{arxiv.1601.04634,
title = {Loop-tree duality and quantum field theory in four dimensions},
author = {German F. R. Sborlini},
journal= {arXiv preprint arXiv:1601.04634},
year = {2016}
}
Comments
10 pages, 1 figure. Contribution to the Proceedings of the 12th International Symposium on Radiative Corrections (Radcor 2015) and LoopFest XIV (Radiative Corrections for the LHC and Future Colliders)