Weak-neutral-current effects ine−+e+→q+q¯→(Λ,Σ,Λc,Σc,…)+Xande−+e+→q+q¯→(ρ,K*,D*,…)+X

The forward-backward asymmetry $A_B$ and longitudinal polarization $P_B$ of a spin-½ baryon in the process $e^{-}+e^{+}\to B+X$ are calculated in terms of the vector ($a_q$) and axial-vector ($b_q$) weak-neutral-current couplings of the quarks composing $B$, their electric charges $Q_q$, and their ($q\to B$) fragmentation probabilities. Using a theoretical argument for baryons composed of one heavy $c,b,\dots$, quark and two light $u$,$d$ quarks, and SU(3) symmetry for baryons composed of light $u$,$d$,$s$ quarks, $A_B$ is expressed in terms of $b_q$ and $Q_q$ only. In similar fashion, some relations between the various $P_B$, independent of the fragmentation probabilities, are obtained. The results are discussed in detail for the strange and charmed baryons. The corresponding weak-neutral-electromagnetic interference effects for the vector mesons are also briefly discussed.