TestingV−AinΛbdecays

We comment on a recent suggestion by Amundson, Rosner, Worah, and Wise to test the chirality of the $b$-quark decay coupling via polarized ${\Lambda }_b$ baryons produced in $e^{+}{e}^{-}\to Z\to {\Lambda }_b+X$. We study the effect of contributions from an amplitude in which a right-handed $b$-to-$c$ current couples to a $V-A$ lepton current.