Dr. Silvia Zanoli

In recent years, perturbative calculations have reached unprecedented levels of accuracy in view of the increasing demand for precision in the data-theory comparison within the LHC physics program. Yet, as perturbative accuracy increases, a still open problem lies on the critical path for precision, namely hadronisation. An important class of observables which is affected by large hadronisation corrections is given by event shapes, which play a crucial role in the determination of the running coupling alpha_s. In this talk, I will present an analysis of non-perturbative power corrections to event shapes using the PanScales showers. I will discuss how the associated scaling with the scattering energy Q  is governed by an anomalous dimension that can be resummed to all order by the shower. Moreover, I will show how this non-global resummation can be performed analytically for linear observables, leading to a remarkably simple result that opens the door to a deeper understanding of the analytic structure of hadronisation. I will also show that this simple behaviour holds also beyond the two-jet limit.