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We calculate the massive Wilson coefficients for the heavy flavorcontributions to the non-singlet charged current deep-inelastic scatteringstructure functions $F_L^{W^+}(x,Q^2)-F_L^{W^-}(x,Q^2)$ and$F_2^{W^+}(x,Q^2)-F_2^{W^-}(x,Q^2)$ in the asymptotic region $Q^2 \gg m^2$ to3-loop order in Quantum Chromodynamics (QCD) at general values of the Mellinvariable $N$ and the momentum fraction $x$. Besides the heavy quark pairproduction, also the single heavy flavor excitation $s \rightarrow c$contributes. Numerical results are presented for the charm quark contributionsand consequences on the unpolarized Bjorken sum rule and Adler sum rule arediscussed.

The Asymptotic 3-Loop Heavy Flavor Corrections to the Charged Current Structure Functions $F_L^{W^+-W^-}(x,Q^2)$ and $F_2^{W^+-W^-}(x,Q^2)$