O(α s ) corrections to the decays of polarized W ± and Z bosons into massive quark pairs S. Groote, J.G. Körner and P. Tuvike Eur. Phys. J. C, 72 10 (2012) 2177 Published online: 09 October 2012 DOI: 10.1140/epjc/s10052-012-2177-9