Speaker
Tord Riemann
(DESY)
Description
The Z boson line shape can be studied with unprecedented precision at certain future e+e- collider projects. For example, the Fcc-ee might produce 10^13 Z bosons. This will demand for true two-loop calculations in the Standard Model, and even higher precision in the QED part. As alternative, sophisticated model-independent approaches are welcome. I discuss questions related to both theoretical scenarios, with an emphasis of the role of the S-matrix approach to data, as it is realized in the SMATASY/ZFITTER project. Existing experimental studies are reviewed.
Author
Tord Riemann
(DESY)
