Conveners
Plenary 4
- Matthias Steinhauser (KIT)
Plenary 4
- Matthias Steinhauser (KIT)
One loop radiative corrections to beta-decays of hadrons are significantly enhanced with respect to analogous corrections to the muon decay. The nature of this enhancement will be presented, stressing similarities and differences with the Sommerfeld enhancement near the threshold. Extension to two loops will be discussed, as well as applications to other processes including the solar...
I'd like to present the results for the numerical calculation of the 2-loop virtual amplitudes for qq->ttH production based on the recent work of arXiv:2402.03301, describing the methods (i.e. sector decomposition), the tools (pySecDec and Ratracer), and the outlook for the remaining work.
The current frontier of NNLO computations is represented by $2\to3$ processes with external massive legs. In this talk we will present recent progresses in NNLO QCD computations for processes where a heavy-quark pair is produced in association with a massive boson, mainly focusing on $t \bar{t} H$, $Wb\bar b$ and $Wt\bar t$ production.
The achievement of a complete NNLO calculation for this...
I report on recent progress in the calculation of heavy-quark correlation functions at five loops.
Scattering amplitudes in the high-energy limit can be described in terms of their singularity structure in the complex angular momentum plane, consisting of Regge poles and cuts. In QCD, gluon Reggeization has long been understood as a manifestation of a Regge pole, but until recently Reggeization violation remained largely obscure. New methods based on rapidity evolution equations allow for...
Numerical evaluations of 2-loop kites and 3-loop tadpoles
with elliptic obstructions lead to remarkable empirical
evaluations in terms of polylogarithms, for which proofs
are very hard to find, notwithstanding intensive use of packages
such as HyperInt and MZIteratedIntegral. I shall describe the
efficient methods by which these puzzlingly simple evaluations
were obtained and...
