M. Jezabek1,2 - P. Urban1
1 Institute of Physics, University of Silesia,
ul. Uniwersytecka 4, 40007 Katowice, Poland
2 Institute of Nuclear Physics, Kawiory 26a, 30055 Cracow, Poland
Received: 14 January 1999 / Revised version: 14 May 1999 / Published online: 14 October 1999
The paper gives the polarization of the tau lepton in the semileptonic B decays with respect to the direction of the virtual W boson. The result given includes the nonperturbative HQET corrections. The perturbative QCD corrections are probably negligible, as is suggested by the existing results for the longitudinal polarization of the charged lepton (Jezabek and Urban, 1998).