22-29 July 2015
Europe/Vienna timezone

From dimensional regularization to NLO computations in four dimensions

Jul 24, 2015, 3:45 PM
15m
HS32

HS32

talk QCD and Hadronic Physics QCD and Hadronic Physics

Speaker

German Sborlini (IFIC-Valencia)

Description

Loop-tree (LT) 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 show that it is possible to recover physical results by simply taking the four-dimensional limit of some D-dimensional expressions. Moreover, this method provides a natural physical interpretation of infrared singularities, their origin and the way that they cancel in the complete computation.

Primary authors

German Rodrigo Garcia (IFIC Valencia) German Sborlini (IFIC-Valencia) Roger Hernandez Pinto (IFIC-Valencia)

Presentation materials