Infrared subtraction beyond NLO

by Paolo Torrielli (U Torino)

Tuesday 12 Feb 2019, 15:00 → 16:00 Europe/Berlin

seminar room 4b (building 1B)

I present a new method for the local subtraction of infrared divergences at next-to-next-to-leading order (NNLO) in QCD. The method aims at minimising the complexity of the problem through a partition of the phase space, still allowing an analytic integration of the ensuing subtraction counterterms. A connection between infrared subtraction and factorisation of scattering amplitudes to all orders in perturbation theory is then traced, enabling the construction of subtraction counterterms beyond NNLO.

Slides Torrielli_subtraction.pdf