  We present the first results for the next-to-next-to leading order (NNLO)
corrections to the semi-inclusive deep-inelastic scattering process in
perturbative quantum chromodynamics. We consider the quark initiated flavor
non-singlet process and obtain the complete contributions analytically at
leading color. All relevant virtual and real emission Feynman diagrams have
been computed using integration-by-parts reduction to master integrals and two
approaches for their subsequent evaluation (parametric phase-space integration
and method of differential equations). The numerical analysis demonstrates the
significance of the NNLO corrections and their great impact on the reduction of
the residual scale dependence.
