The strong coupling from the IR to the UV extremes: Determination of ${\alpha }_s$ and prospects from EIC and JLab at 22 GeV

We discuss how the Bjorken sum rule allows access to the QCD running coupling ${\alpha }_s$ at any scale, including in the deep infrared IR domain. The Bjorken sum data from Jefferson Lab, together with the world data on ${\alpha }_s$ reported by the Particle Data Group, allow us to determine the running of ${\alpha }_s(Q)$ over five orders of magnitude in four-momentum $Q$. We present two possible future measurements of the running of ${\alpha }_s(Q)$ using the Bjorken sum rule: the first at the EIC, covering the range $1.5<Q<8.7$ GeV, and the second at Jefferson Lab at 22 GeV, covering the range $1.0<Q<4.7$ GeV.