ANOMALY CANCELLATION IMPLICATION FOR Z′ DECAY TO FERMION PAIR

Abstract

Z′ boson vector and axial vector couplings to fermions are studied in terms of anomaly cancellation in the condition of small Z–Z′ mixing. The anomaly-free U(1)′ charge assignment that parametrized by two independent charges is proposed. Z′ decay width to fermion pair [Formula: see text], hadron-to-lepton ratio [Formula: see text], hadron branching ratio [Formula: see text], left–right asymmetry [Formula: see text] and forward–backward asymmetry [Formula: see text] are investigated. A special sum rule of Z′ decay widths is also derived.