Gluon bremsstrahlung in e+e− annihilation

The linear and circular polarizations of gluons emitted in electron-positron annihilation, e+e−→qqg, are evaluated, including neutral current and beam polarization effects. For the lower part of the gluon bremsstrahlung spectrum, the linear polarization is found to be large and the plane of polarization to be almost parallel to the qqg event plane. The neutral current induced circular polarization is in the upper part of the gluon spectrum of...