Additional Z contributions to the accompanied dilepton cross section at e +e − colliders

• Published in: Physics letters. B Vol. 260; no. 1; pp. 219 - 224
• Main Authors: Diakonos, F., Katsilieris, G., Korakianitis, O., Vlassopulos, S.D.P.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 09.05.1991

We calculate in detail the effect of an additional U (1) factor to the four-fermion process e + e −→ℓ +ℓ −+ q q (ℓ= e,μ) at the Z peak as well as the CM energies √ s=200 and 500 GeV.