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Loop-tree duality and quantum field theory in four dimensions · Around

2016

Loop-tree duality and quantum field theory in four dimensions

Sborlini, German F. R.

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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.

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R. Boughezal, C. Focke, X. Liu and F. Petriello, arXiv:1504.02131 [hep-ph]

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R. P. Feynman, In *Brown, L.M. (ed.): Selected papers of Richard Feynman* 867-887

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S. Buchta, PhD. thesis, Universitat de València, 2015. arXiv:1509.07167 [hep-ph]

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