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The Character of Z-pole Data Constraints on Standard Model Parameters

Authors
  • Kawamoto, T.
  • Kellogg, R. G.
Type
Published Article
Publication Date
Sep 17, 2004
Submission Date
Feb 26, 2004
Identifiers
DOI: 10.1103/PhysRevD.69.113008
Source
arXiv
License
Unknown
External links

Abstract

Despite the impressive precision of the Z-pole measurements made at LEP and SLC, the allowed region for the principle Standard Model parameters responsible for radiative corrections (the mass of the Higgs, the mass of the top and alpha(Mz)) is still large enough to encompass significant non-linearities. The nature of the experimental constraints therefore depends in an interesting way on the "accidental" relationships among the various measurements. In particular, the fact that the Z-pole measurements favor values of the Higgs mass excluded by direct searches leads us to examine the effects of external Higgsstrahlung, a process ignored by the usual precision electroweak calculations.

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