9 papers
Heavy Quarks at Threshold: Recent Developments
Matthias Steinhauser
Recent developments in the treatment of a system of heavy quarks close to their production threshold are discussed. Particular emphasis is put on the next-to-next-to-next-to-leadin…
Second Order QCD Corrections to the Top Decay Rate
K. G. Chetyrkin, R. Harlander, T. Seidensticker +1
We report on a recent calculation of the top decay rate up to order α_s^2. It is based on asymptotic expansions of the off-shell top propagator, followed by a Padé approximation in…
Hadronic contribution to and the anomalous magnetic moment of the muon
M. Steinhauser
In this contribution recent developments are discussed which lead to a significant reduction of the error for and .
Completely Automated Calculations of Multi-Loop Diagrams
M. Steinhauser
The computation of higher order processes very often involves a large number of diagrams. In addition, it is in general not possible to solve the occurring integrals explicitly and…
O(α_s^2) Corrections to Current Correlators
M. Steinhauser
In this contribution three-loop QCD corrections to current correlators are considered. The application of the large momentum procedure, which provides a systematic expansion in $(m…
Higher Order Corrections to the Hadronic Higgs Decay
M. Steinhauser
A Higgs boson in the intermediate mass range is considered. An effective Lagrangian approach is used in order to evaluate the top-induced QCD corrections of order to the de…