The Cross Section of e+ e- Annihilation into Hadrons of Order alphaₛ⁴ nf² in Perturbative QCD
Baikov, P. A. · Chetyrkin, K. G. · Kühn, J. H.
Original · EN
We present the first genuine QCD five-loop calculation of the vacuum polarization functions: analytical terms of order alphaₛ⁴ nf² to the absorptive parts of vector and scalar correlators. These corrections form an important gauge-invariant subset of the full O(alphaₛ⁴) correction to e+ e- annihilation into hadrons and the Higgs decay rate into hadrons respectively. They discriminate between different widely used estimates of the full result.
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