arXiv:hep-ph/9907547·v1·High Energy Physics — Phenomenology
Initial-Final-State Interference in the Z line-shape
S. Jadach🇩🇪 · B. Pietrzyk🇫🇷 · E. Tournefier🇨🇭 · B.F.L. Ward🇺🇸 · Z. Was🇨🇭
Abstract
The uncertainty in the determination of the Z line-shape parameters coming from the precision of the calculation of the Initial-State Radiation and Initial--Final-State Interference is 2 10**(-4) for the total cross section sigma zero(had) at the Z peak, 0.15 MeV for the Z mass M Z, and 0.1 MeV for the Z width Gamma Z. Corrections to Initial--Final-State Interference beyond \Order{\alpha^1} are discussed.
Comments: 10 pages LaTeX including 2 PostScript figures