Speaker
Laura Walsh
Description
The soft anomalous dimension encodes infrared divergences that arise from soft virtual particles. Crucially, this object – a matrix in colour space – is universal; it need only be calculated once then can be used for all QCD amplitudes. While the soft anomalous dimension has been directly calculated up to three loops in the massless case, the three loop massive and four loop massless remain out of reach. In this talk, I will discuss the symbol bootstrap approach to calculating the soft anomalous dimension and ways in which the ansatz can be constrained.
