Speaker
Michel Stillger
(JGU Mainz)
Description
The higher-order behavior of logarithmically enhanced contributions in non-global observables is very intricate, in particular as double-logarithmic corrections arise first at high orders in perturbation theory. The resummation of these super-leading logarithms (SLLs) is extended by including the running of the strong coupling $\alpha_s(\mu)$, i.e. in RG-improved perturbation theory. This is done by using a new representation of the evolution operator, also allowing to show that higher order Glauber exchanges are parametrically suppressed. Working in the large-$N_c$ limit, it is possible to resum these higher-order Glauber exchanges to all orders for processes with quarks and/or gluons in the initial state.
Authors
Michel Stillger
(JGU Mainz)
Philipp Böer
(JGU Mainz)
Patrick Hager
(JGU Mainz)
Matthias Neubert
(JGU Mainz)
Xiaofeng Xu
(JGU Mainz)