It is well known that Glauber modes are responsible for generating the imaginary part of the S-matrix, even away from the forward limit. In this talk I will show this fact allows one to calculate both rapidity and canonical anomalous dimensions using unitarity methods. I will give explicit examples in the context of: the Sudakov form factor, the Regge trajectory, and the transverse momentum...
The higher-order behavior of logarithmically enhanced contributions in non-global observables at hadron colliders is very intricate, in particular as double-logarithmic corrections arise first at four-loop order. For realistic values of the low energy scale and the partonic center-of-mass energy the contribution of these so called super-leading logarithms (SLLs) is comparable to the one of...
We implement the two-loop anomalous dimension governing the resummation of non-global logarithms into a large-$N_c$ parton shower framework which solves the renormalization group equations used to evolve from the collision energy to the scale associated with soft emissions. Combined with the one-loop corrections to the hard and soft functions we obtain resummed predictions at next-to-leading...
