The three-loop single-mass heavy-flavor corrections to the structure functions F₂(x,Q²) and g₁(x,Q²)

We report quantitative results on the single-mass heavy-flavor contributions up to three-loop order to the unpolarized structure function F₂(x,Q²) and the polarized structure function g₁(x,Q²) for the first time. These results are relevant for precision QCD analyses of the World deep-inelastic data and the data taken at future colliders, such as the Electron--Ion Collider, in order to measure the strong coupling constant αₛ(MZ²), and the twist-2 parton distribution functions consistently at next-to-next-to-leading order.