On the singular behaviour of scattering amplitudes in quantum field theory
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On the singular behaviour of scattering amplitudes in quantum field theory

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On the singular behaviour of scattering amplitudes in quantum field theory

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Buchta, Sebastian; Chachamis, Grigorios; Draggiotis, Petros; Malamos, Ioannis; Rodrigo García, Germán Vicente
Aquest document és un/a article, creat/da en: 2014
We analyse the singular behaviour of one-loop integrals and scattering amplitudes in the framework of the loop-tree duality approach. We show that there is a partial cancellation of singularities at the loop integrand level among the different components of the corresponding dual representation that can be interpreted in terms of causality. The remaining threshold and infrared singularities are restricted to a finite region of the loop momentum space, which is of the size of the external momenta and can be mapped to the phase-space of real corrections to cancel the soft and collinear divergences.

    Buchta, Sebastian Chachamis, Grigorios Draggiotis, Petros Malamos, Ioannis Rodrigo García, Germán Vicente 2014 On the singular behaviour of scattering amplitudes in quantum field theory Journal Of High Energy Physics 11 11 014-1 014-13
http://dx.doi.org/10.1007/JHEP11(2014)014
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