Speaker
Ben Assi
Description
We begin by reviewing how NLL accuracy is achieved in modern parton showers—highlighting the recent Sherpa implementation—and then introduce our new information-theoretic matching framework to achieve beyond NLL accuracy. By minimizing a Kullback–Leibler functional under constraints set by precision QCD inputs observables (including theory uncertainties), we embed high-order predictions into fully differential, particle-level simulations with strictly positive event weights and the ability to impose multiple observable constraints simultaneously. As a proof of concept, we apply the method to the thrust distribution in e⁺e⁻ collisions, revealing the overlooked role of logarithmic moments of thrust and related event shapes.