The Z boson width: higher order effects and influence on the Z line shape

  • Wolfgang Hollik
Conference paper

Abstract

The width of the Z boson has two faces: the one which determines, in the interplay with bremsstrahlung, the peak maximum of the Z cross section, and the other one which is a prediction of the Standard Model allowing a confrontation with experimental data as a test of the theory. We give an overview how the total and partial Z widths are calculated including the O(α2) contributions. The dependence on the Higgs and top mass is discussed as well as the effect of the these presently unknown parameters on the Z line shape. The relation of the peak maximum to the physical Z mass turns out to be independent of the Higgs and top mass within 2 MeV which allows to measure Mz as an independent input parameter. Some observable effects in Z decays resulting from non-standard charged Higgs bosons are also presented.

Keywords

Convolution Ghost 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • Wolfgang Hollik
    • 1
  1. 1.CERNGenevaSwitzerland

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