Angular asymmetries and final state polarization effects in $$e^ - e^ + \to \gamma , {\rm Z}^0 \to q\bar qg$$

Abstract

We discuss the forward-backward asymmetry and the polarization (mean helicity) of the quark, antiquark and gluon ine−e+→γ,\(e^ - e^ + \to \gamma , {\rm Z}^0 \to q\bar qg\), and of the inclusively produced hadrons (baryons or vector mesons) belonging to the most energetic jet. In the energy range of present interest we find substantial asymmetries (up to 30%) and polarizations (up to 15%), with partons (predominantly antiquarks) of positive helicity emitted preferentially in the forward direction.