Speaker
Alexey Pak
(University of Alberta)
Description
O(alpha_s^2) corrections to semileptonic b-quark
decay rate are calculated to several orders in m_c/m_b.
Applied to the muon decay, they lead to a -0.43 ppm
decrease in the lifetime. We also present recent
results of our group on NNLO corrections to t-quark
decay into polarized W-bosons.
