Speaker
Alex Bennett
(Durham University)
Description
Event shapes, such as Thrust and C-Parameter, are simple observables
that have been measured to high accuracy at electron-positron
colliders. Using Soft Collinear Effective Theory (SCET), an event shape
distribution can be factored into simpler pieces, including the soft
function which describes the corrections due to low energy QCD
radiation.
In this talk I will present the calculation of a NNLO soft function for
a new family of event shapes called C-Angularity. These event shapes
are an extension of the C-parameter, and are of particular interest for
determining the strong coupling constant $\alpha_S$.
