ABSTRACT
Lepton-lepton scattering offers opportunities to study electroweak interactions rather cleanly, since leptons have no strong interactions. We start this chapter by deriving the formulas for a general fermion-antifermion scattering at tree level via gauge-boson exchanges; in later sections we apply these formulas to particular cases. The e + e − interactions via the Z 0 gauge boson are of special interest, in the era of “Z factories” at the SLC and LEP colliders.
