Internal Seminar by Sebastian Jaskiewicz

Friday 12 Nov 2021, 14:00 → 15:00 Europe/London

Title
Infrared singularities and the collinear limits of scattering amplitudes

Abstract:
The study of scattering amplitudes to high orders in the perturbative expansion is critical for the success of the precision physics program at the LHC and further advancing our understanding of quantum field theories. Scattering amplitudes simplify in various kinematic limits and exhibit a factorized form that offers a window into their all-order structure. In this talk, I will discuss the multi-particle collinear limits of n-point scattering amplitudes at the third and fourth-order in the strong coupling expansion. I will show the form of the splitting anomalous dimension, the object which governs the behaviour of amplitudes in the collinear limit.  Moreover, I will discuss the constraints which are necessary to preserve the all-order factorization. 

Zoom link:  IPPP Seminars (Friday at 2 pm UK time)

https://durhamuniversity.zoom.us/j/99420124988?pwd=ZEFLSDB3THJtaWZOTU54R25mT1NuZz09

Meeting ID: 994 2012 4988