On Testing V-A in Lambda_b Decays

Abstract

We comment on a recent suggestion by Amundson, Rosner, Worah and Wise to test the chirality of the $b$-quark decay coupling via polarized $Λ_b$ baryons produced in $e^+e^-\rightarrow Z\rightarrow Λ_b +X$. 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.