The series Lecture Notes in Physics (LNP), founded in 1969, reports new developments in
physics research and teaching-quickly and informally, but with a high quality and the explicit …

A closed formula is obtained for the infrared singularities of dimensionally regularized,
massless gauge-theory scattering amplitudes with an arbitrary number of legs and loops. It …

A bstract The rapidity anomalous dimension controls the scaling of transverse momentum
dependent observables in the Sudakov region. In a conformal theory it is equivalent to the …

We consider high spin operators. We give a general argument for the logarithmic scaling of
their anomalous dimensions which is based on the symmetries of the problem. By an …

A formula for the two-loop infrared singularities of dimensionally regularized QCD scattering
amplitudes with an arbitrary number of massive and massless legs is derived. The …

We present the complete four-loop four-point amplitude in N= 4 super-Yang-Mills theory, for
a general gauge group and general D-dimensional covariant kinematics, and including all …

A bstract We revisit the multi-loop structure of the anomalous-dimension matrix governing
the infrared divergences of massless n-particle scattering amplitudes in non-abelian gauge …

We review recent progress in determining the infrared singularity structure of on-shell
scattering amplitudes in massless gauge theories. We present a simple ansatz where soft …

Previous work on electroweak radiative corrections to high-energy scattering using soft-
collinear effective theory (SCET) has been extended to include external transverse and …

The lightlike cusp anomalous dimension is a universal function that controls infrared
divergences in quite general gauge theories. In the maximally supersymmetric Yang-Mills …