Conveners
Parallel 5
- Carsten Schneider (RISC, Johnnes Kepler University Linz)
Parallel 5
- Carsten Schneider (RISC, Johnnes Kepler University Linz)
The high-energy limit of 2->2 scattering amplitudes offers an excellent setting to explore the analytic properties and universal features of gauge theories. At leading logarithmic (LL) accuracy the amplitude is governed by Regge poles in the complex angular momentum plane. Beyond LL, Regge cuts in this plane begin to play an important role. Specifically, the signature-odd amplitude at...
Singular factors originating from the QCD factorisation of scattering amplitudes in soft and collinear limits play a prominent role in both organising and computing high-order perturbative contributions to hard-scattering cross sections. In this talk, I will report on recent work done in collaboration with Stefano Catani. We start from the factorization structure of scattering amplitudes in...
We present the resummed predictions for inclusive cross section for Drell-Yan and Higgs boson production at next-to-next-to leading logarithmic (\bar{NNLL}) accuracy taking into account both soft-virtual (SV) and next-to SV (NSV) threshold logarithms. We restrict ourselves to resummed contributions only from the diagonal channels for both the processes. We derive the N-dependent coefficients...
We present the DIS coefficient functions at four loops in QCD and beyond.
In QCD the anomalous dimensions of gauge invariant operators of twist 2 play a key role, because they control the scale dependence of the parton distribution functions. Notably, flavour singlet operators, such as those associated to the gluon distribution, mix under renormalisation with a set of unphysical operators, also known as aliens. Missing this effect leads to wrong results already for...
