Time: 3:00 - 4:00pm Speaker: Dr Keith Hamilton (UCL)Venue: Zoom event
Title: Parton showers beyond leading logarithmic accuracy
Abstract: Parton showers are among the most widely used tools in collider physics. Despite their key importance, none so far has been able to demonstrate accuracy beyond a basic level known as leading logarithmic (LL) order. We propose criteria for parton showers to be considered accurate at the next-to-leading logarithmic (NLL) level. We go on to introduce new classes of shower, for final-state radiation, satisfying the main elements of these criteria in the large-Nc limit. Finally, we compare results from concrete implementations of the new showers to those of observable-specific, analytical, NLL calculations.