Oct 2021 - Sept 2022

Internal Seminar by Sebastian Jaskiewicz


Infrared singularities and the collinear limits of scattering amplitudes

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)


Meeting ID: 994 2012 4988