Decoupling constant for ${\alpha }_s$ and the effective gluon-Higgs coupling to three loops in supersymmetric QCD

Alexander Kurz, Matthias Steinhauser, Nikolai Zerf

We compute the three-loop QCD corrections to the decoupling constant for ${\alpha }_s$ which relates the Minimal Supersymmetric Standard Model to Quantum Chromodynamics with five or six ac…